| Year | Title | Role | Notes |
|---|
| 1980 | The Jack Rabbit Story: Easter Fever | Don Rattles, Steed Martin[24] | Television film |
| Take Me Up to the Ball Game | Additional Voices |
| 1985–1986 | Inspector Gadget | Chief Quimby | Season 2 |
| 1986 | Faerie Tale Theatre | Mockingbird Maurice | |
| The Transformers | Six-Gun | Episode: "Thief in the Night" |
| Popples | Puzzle | |
| 1986–1991 | The Real Ghostbusters | Egon Spengler, Various Voices | |
| 1987 | The Facts of Life | Rod Sperling | Episode: "Seven Little Indians" |
| Popeye and Son | Popeye | |
| DuckTales | Count Roy | Episode: "Duck in the Iron Mask" |
| Wordplay | Himself | Contestant |
| 1988 | The New Adventures of Beany and Cecil | Dishonest John | |
| Dennis the Menace | George Wilson, Henry Mitchell, Ruff | |
| 1989 | Dennis the Menace | George Wilson, Henry Mitchell, Ruff | |
| 1989–1992 | G.I. Joe: A Real American Hero | Copperhead,Low-Light,Spirit,Serpentor,Destro, Big Ben | |
| 1990–1991 | Attack of the Killer Tomatoes | Zoltan[24] | |
| 1990–1995 | Captain Planet and the Planeteers | Verminous Skumm, Duke Nukum | |
| Tiny Toon Adventures | Dizzy Devil,Tasmanian Devil,Yosemite Sam, Blueboy, Robin Killems, Board Artist, Parum Pum Man[24] | |
| 1991 | TaleSpin | General Patton | |
| Where's Waldo? | Additional Voices | |
| 1991–1995 | Taz-Mania | Hugh Tasmanian Devil, Daniel Platypus,Daffy Duck,Drew Tasmanian Devil,Yosemite Sam | |
| 1993 | Batman: The Animated Series | Murphy[24] | Episode: "The Man Who Killed Batman" |
| 1993–1994 | Bonkers | Mr. Blackenblue, Smarts, Tuttle Turtle, Al Vermin | |
| 1993–1996 | Rocko's Modern Life | Additional Voices | |
| 1993–1998 | Animaniacs | The Brain, Squit, Wakko's Burps,Mel Gibson,Michelangelo,Jack Palance, Reporter,Marvin the Martian, Eli,Captain Kirk, Hisskill,Myles Standish,Santa Claus, Golfing Doctor,Spartacus, Howie Turn,William Shatner, Announcer, Doofy, Conductor[24] | |
| 1994 | The Little Mermaid | Scuttle | |
| 1994–1995 | The Critic | Jeremy Hawke, Principal Mangosuthu,Orson Welles,Humphrey Bogart,Jim Carrey,Bill Clinton,Bill Cosby,Tony Curtis,William Devane,Dirty Harry,Jeff Goldblum,Tom Hanks,Charlton Heston,Snowman,Hannibal Lecter,Dennis Hopper,Michael Jackson,George Lazenby,Rick Moranis,Arthur Bach,Jack Nicholson,Al Pacino,Joe Pesci,Elvis Presley,Claude Rains,Keanu Reeves,Arnold Schwarzenegger,William Shatner,Christian Slater,Howard Stern,Jean-Luc Picard,The Three Tenors, Additional Voices | Main role |
| 1995–present | The Simpsons | George C. Scott,Commander McBragg,Orson Welles,Vincent Price,Toucan Sam, Milo, Hedonismbot Cosplayer, Various Voices | Recurring role |
| 1995–1996 | What a Cartoon! | Man #2, Captain #1, Big Fat Roy[24] | 2 episodes |
| Dumb and Dumber | Fingers, Black Jack Dealer, Roy, Announcer, Mulligan, Principal[24] | |
| 1995 | Rugrats | Store Clerk | |
| 1995–2004 | Johnny Bravo | Dr. Alphonse, Squint Ringo, Fish Lips Malone, Additional Voices[24] | |
| 1995–1997 | Freakazoid! | Longhorn, The Brain, Krimson Kvetch, Rathgar, William Shatner, Dan,Morality and You Host[24] | |
| 1995–1998 | Pinky and the Brain | The Brain[24] | |
| Gadget Boy & Heather | Boris, Mulch and Humus, Myron Dabble, Chief Strombolli, G9 | |
| 1995–2001 | The Sylvester and Tweety Mysteries | Yosemite Sam, Bingo Barker, Lojack, Sam Spade, Harry Follicle, Pjerry Nelson[24] | |
| 1996–2003 | Dexter's Laboratory | Simion, various voices[24] | |
| 1996 | The Tick | Hotel Manager[24] | Episode: "The Tick vs. Prehistory" |
| 1996–1997 | Captain Simian & the Space Monkeys | Dr. Splitz, Matrix, Holo-boon 3462830, Kaz-Par, Olram[24] | |
| The Incredible Hulk | Doctor Strange | |
| 1996–2004 | Hey Arnold! | Big Bob Pataki, various voices[24] | |
| 1996–1998 | Stickin' Around | Additional Voices | |
| 1997 | Road Rovers | Russian President, Radio Announcer, Malcomb LaMarche[24] | |
| Recess | Additional Voices | |
| Extreme Ghostbusters | Egon Spengler | |
| The Wacky World of Tex Avery | Mooch, Emperor, Narrator, Additional Voices | |
| Nightmare Creatures | Narrator | Television commercial[27] |
| 1997–2006 | Space Goofs | Etno Polino, additional voices[24] | |
| 1998 | The Wacky Adventures of Ronald McDonald[28] | Dr. Quizzical, Burger Chef, Knight | 2 episodes |
| Oh Yeah! Cartoons | Little Guy, Wet Guy, Circus Guy, Rothgar, Toby, Frosty the Flake, Tiger[24] | 3 episodes |
| 1998–2000 | Histeria! | George Washington,Abraham Lincoln,Woodrow Wilson,William Shakespeare,Amerigo Vespucci,Michelangelo,Socrates, Various Voices[24] | Recurring role |
| 1998–1999 | Pinky, Elmyra & the Brain | The Brain[24] | Main role |
| 1998–2005 | CatDog | Narrator | |
| The Powerpuff Girls | Additional Voices[24] | Recurring role |
| 1999 | Sonic Underground | Sleet | Main role |
| 1999–2000 | Mickey Mouse Works | Mortimer Mouse | Recurring role |
| Dilbert | The World's Smartest Garbageman | |
| Sabrina: The Animated Series | Additional Voices | Recurring role |
1999–2003, 2008–2013, 2023–present | Futurama | Calculon, Kif Kroker, Morbo, Lrrr, Axl Kroker, Walt, Donbot, Clamps, Hyper-Chicken Lawyer, Hedonismbot, Scoop Chang (season 5-7), Crushinator, Horrible Gelatinous Blob, Raoul, Headless Body ofSpiro Agnew, Headless Clone of Spiro Agnew, Brain Spawn, "Anthology of Interest" Narrator, "The Scary Door" Announcer,George Washington's Head,George Michael's Head,Abraham Lincoln's Head,Theodore Roosevelt's Head,Charles de Gaulle's Head,Harry S. Truman's Head,Mario,Donkey Kong,Orson Welles' Head, Various Voices | Main role |
| 2000 | Hard Drinkin' Lincoln | John Wilkes Booth | |
| Buzz Lightyear of Star Command | Ambassador[24] | Episode: "Speed Trap" |
| 2000–2002 | Queer Duck | Oscar Wildcat, Mr. Duckstein, others | |
| 2000–2003 | Poochini's Yard | Dirt, Additional Voices | |
| 2001 | Baby Felix & Friends | Master Cylinder | |
| 2001–2002 | The Oblongs | Tommy Vinegar | |
| What's with Andy? | Principal DeRosa | Season 1 |
| 2001–2003 | House of Mouse | Various Voices | |
| 2001–2004 | Jackie Chan Adventures | Ikazuki, Cardiff Zendo, Tso Lan | Recurring role |
| 2001–2007 | Harvey Birdman, Attorney at Law | Azul Falcone, Stan Freezoid,Apache Chief,Fred Flintstone,Yogi Bear,Inch High,Speed Buggy,Hi-Riser, Doggie Daddy,Droopy Dog,Quick Draw McGraw,Wally Gator,Magilla Gorilla,Shazzan,Atom Ant, Various[24] |
| 2002 | Kim Possible | Big Daddy Brotherson | |
| Samurai Jack | The Boss, Bouncer #2[24] | Episode: "Jack and the Gangsters" |
| 2002–2003 | Gadget & the Gadgetinis | Lt. Gadget | |
| 2002–2004 | Teamo Supremo | Baron Blitz | |
| 2002–2008 | Codename: Kids Next Door | Father, Various[24] | Recurring role |
| 2003–2006 | The Adventures of Jimmy Neutron: Boy Genius | Zix, Various[24] |
| 2003 | K10C: Kids' Ten Commandments | Omri, Amos | |
| 2003–2004 | Sabrina's Secret Life | Salem Saberhagen[24] | |
| Stripperella | Various characters[24] | |
| 2004–2005 | Duck Dodgers | K'chutha Sa'am, Masativo[24] | Recurring role |
| 2004–2006 | Xiaolin Showdown | Master Fung (season 2-3), Tubbimura, Chucky Choo, Various[24] | Main role |
| Brandy & Mr. Whiskers | Additional Voices | |
| 2004 | Party Wagon | Bumpy Snits, Ferryman, Cowpoke[24] | Television film |
| 2005 | A.T.O.M. | Eel, Fender[24] | |
| The Buzz on Maggie | Additional Voices | |
| Loonatics Unleashed | Ice Cream Vendor, Ophiuchus Sam, Pierre le Pew[24] | 2 episodes |
| 2005–2007 | Tripping the Rift | Gus[24] | |
| Catscratch | Hovis, Additional Voices[24] | Main role |
| 2005–2008 | Camp Lazlo | Additional Voices | |
| My Gym Partner's a Monkey | Principal Pixiefrog, Mr. Mandrill, Mr. Hornbill, Mr. Blowhole, Various | Main role |
| 2006–2007 | Shuriken School | Mr. No, Naginata, Kubo Utamaro, Zumichito, Daisuke Togakame | |
| Class of 3000 | Southern Gentleman, Mr. Beals, Killer Robot, Purple Beverage Man, Game Show Host[24] | |
| 2006 | The Batman | Bruiser[24] | Episode: "A Matter of Family" |
| Codename: Kids Next Door - Operation Z.E.R.O. | Father[29] | Television film |
| 2007 | Chowder | Additional Voices | |
| El Tigre: The Adventures of Manny Rivera | |
| 2007–2008 | Tak and the Power of Juju | Chief | Main role |
| 2007–2009 | Random! Cartoons | Klemp, Birdsdorf, Elecaptain Sam, Bjorn, Working Troll, Pickle Cop, Dog Catcher[24] | |
| 2008 | The Marvelous Misadventures of Flapjack | Additional Voices | |
| The Mighty B! | |
| The Boondocks | Larry King, Donald Richards | Episode: "The S-Word" |
| 2008–2011 | Back at the Barnyard | Igg, Max Fripplehoot, Termite, Gruff Announcer, Network Announcer,Albert Einstein, Captain[24] | |
| 2009 | The Cleveland Show | Keith Leib | Episode: "Birth of a Salesman" |
| 2009–2011 | Bob & Doug | Various voices | |
| 2010 | Axe Cop Motion | Avocado Soldier[30] | Web comic |
| 2010–2013 | Pound Puppies | Jean Luc Glaciaire, Agent Francois[24] | |
| 2011–2014 | Adventure Time | Grand Master Wizard[24] | |
| The Looney Tunes Show | Yosemite Sam, various voices[24] | Main role |
| 2011–2013 | Scooby-Doo! Mystery Incorporated | Vincent Van Ghoul | |
| Generator Rex | Valve[24] | |
| 2011–present | American Dad! | Colonel Withersby, Uzi Knessett, Additional Voices | |
| 2011–2016 | Transformers: Rescue Bots | Police Chief Charlie Burns, Additional Voices[24] | Main role |
| 2012–2014 | The Legend of Korra | Equalist Announcer, Defense Attorney, Aiwei, Additional Voices[24] | |
| 2012–2015 | Robot and Monster | Gart, Perry, Loudmouth, Jerry, Nicky the Axe, Howly[24] | |
| 2012 | The Garfield Show | Samuel W. Underburger | Episode: "The Write Stuff" |
| Dan Vs. | Mel Darwin | |
| Robot Chicken | The Brain, Ricky Recycle-Bin | Episode: "Eviscerated Post-Coital by a Six Foot Mantis" |
| The Penguins of Madagascar | Various Voices | |
| Hero Factory | Splitface | |
| Have a Laugh! | Mortimer Mouse | |
| 2013–2017 | Ultimate Spider-Man | Doctor Doom,Doombot, Charles the Butler, Plymouth Rocker | Recurring role |
| 2013 | Mickey Mouse Clubhouse | Mortimer Mouse | Episode: "Super Adventure!" |
| Brickleberry | Kurt Thoreau, Donnie, Steve's Dad[24] | |
| Hulk and the Agents of S.M.A.S.H. | Doctor Doom[24] | Episode: "Red Rover" |
| 2013–2014 | Kung Fu Panda: Legends of Awesomeness | Heilang, Lin Kuei, Goose Twins, Pigs[24] | |
| Avengers Assemble | Doctor Doom,Destroyer[24] | 4 episodes |
| 2014–2026 | Rick and Morty | Scary Olderson, Abrodolph Lincoler, Crocubot, Additional Voices | |
| 2014 | Nostalgia Critic | The Brain, Himself | Episode: "The Purge" |
| Teenage Mutant Ninja Turtles | Atilla the Frog,Rasputin[24] | Episode: "The Croaking" |
| VeggieTales in the House | George the Cucumber | Episode: "Larry's Cousin Comes to Town" |
| 2014–2016 | The 7D | Grumpy[24] | |
| Turbo Fast | Tickula, various voices[24] | |
| 2014–2017 | Sonic Boom | Various voices | |
| 2015 | Star vs. the Forces of Evil | King Pony Head[24] | Recurring role |
| 2015–2017 | Penn Zero: Part-Time Hero | Federicks, Unicorn Soldiers, Troll, Crispity Cockatoo[24] | |
| 2015–2018 | New Looney Tunes | Yosemite Sam (season 1) | Main role |
| 2015–2016 | Gravity Falls | Additional Voices | |
| 2016–2019 | The Powerpuff Girls | Mannoy[24] | Recurring role |
| Milo Murphy's Law | Additional Voices | |
| 2017–2019 | The Lion Guard | Kifaru[24] | |
| 2017 | Transformers: Robots in Disguise | Drag Strip, Dragbreak[24] | Recurring role |
| Mickey and the Roadster Racers | Omar, Morty McCool, Action Ashton, Sticky Fingers Fred | 3 episodes |
| All Hail King Julien: Exiled | Koto, Video Game Announcer, Corpse[24] | Main role |
| Hey Arnold!: The Jungle Movie | Big Bob Pataki, Homeless Man 1, Flunky Guard | Television film |
| 2018 | My Little Pony: Friendship Is Magic | Chancellor Neighsay[24] | 5 episodes |
| Big City Greens | Mr. Alucard Grigorian[24] | |
| 2018–2023 | Disenchantment | Odval, Big Jo, Leavo, various characters[24] | Main role |
| 2018–2020 | Rise of the Teenage Mutant Ninja Turtles | Foot Brute, Mobster #1[24] | Recurring role |
| 2019 | The Epic Tales of Captain Underpants | Tubbadump | |
| Love, Death & Robots | Narrator[24] | Episode: "When the Yogurt Took Over" |
| SpongeBob SquarePants | Bus Driver | Episode: "Squid's on a Bus" |
| 2019–2020 | The Rocketeer | Sylvester Slapdash[24] | Recurring role |
| 2020 | Amphibia | Sal[24] | Episode: "Little Frogtown" |
| Scooby-Doo and Guess Who? | Thraber's Ghost, Salesman, Caretaker[24] | Episode: "The Internet on Haunted House Hill!" |
| 2020–2023 | Animaniacs | The Brain,Ian Malcolm, Cyclops, B.R.A.I.N. Bot, Alien #2,Area 51 Scientist[31][24] | Main role |
| 2021 | Devil May Care | Peter | Episode: "The Shipment" |
| 2022–2024 | Mickey Mouse Funhouse | Mortimer Mouse | 4 episodes |
| 2022 | Zootopia+ | Mr. Big[24] | Episode: "The Godfather of the Bride" |
| 2023 | Krapopolis | Centaur, Various | 2 episodes |