These are voices you could never put a face to, but you know them as well as you know any actor. Deep voices, squeaky voices, melodious voices... they bring animation and voice-overs to life. Vote for your favorites, re-rank the list and be sure to add anyone you think has been left off.
list ordered by
Mel Blanc The Flintstones, The Bugs Bunny/Looney Tunes Comedy Hour, Heathcliff & the Catillac Cats
Bugs Bunny & so many of the WB characters
Jim Cummings The Lion King, Aladdin, Shrek
Winnie the Pooh & Tigger
ahmed-maklad added Tara Strong Ted, Rugrats, The Fairly OddParents
Mark Hamill Star Wars: Episode IV - A New Hope, Star Wars: Episode V - The Empire Strikes Back, Star Wars: Episode VI - Return of the Jedi
Most notably, the Joker on Batman: The Animated Series
Hank Azaria The Simpsons, The Simpsons Movie, Godzilla
Moe Syzlak, Wiggum, Apu,the Comic Book Guy, Carl Carlson, Cletus Spuckler, Professor Frink, Dr. Nick Riviera, Lou, Snake, Kirk Van Houten, the Sea Captain, Superintendent Chalmers, Disco Stu, Duffman & MORE
Frank Welker Aladdin, The Real Ghostbusters, The Smurfs
Megatron & Nibbler from Futurama
James Earl Jones The Lion King, Star Wars: Episode VI - Return of the Jedi, Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb
Mufasa, Darth Vader
Dan Castellaneta The Simpsons, Say Anything..., The Simpsons Movie
Billy West Futurama, Clueless, The Ren & Stimpy Show
Philip J Fry, Stimpy, Dr. Zoidberg
June Foray Cinderella, Mulan, Who Framed Roger Rabbit
Tweety, Rocky from Rocky & Bullwinkle, Granny from Looney Tunes,
Chris Abraham added Patrick Warburton Rules of Engagement, Ted, Family Guy
Joe Swanson, Brock Samson and many others
Nancy Cartwright The Simpsons, The Little Mermaid, The Simpsons Movie
Bart Simpson, Ralph Wiggum
JeffMissinne added Don Messick The Flintstones, The Jetsons, Tiny Toon Adventures
Scooby Doo + tons of Hanna Barbera voices
Jim Henson Sesame Street, The Dark Crystal, Labyrinth
Kermit the Frog & Ernie
Tom Islava added Rob Paulsen Teenage Mutant Ninja Turtles, The Fairly OddParents, Animaniacs
Frank Oz Star Wars: Episode V - The Empire Strikes Back, Star Wars: Episode VI - Return of the Jedi, Star Wars: Episode III - Revenge of the Sith
Yoda & Fozzie Bear
Casey Kasem Ghostbusters, Battle of the Planets, What's New
Shaggy from Scooby Doo, of course!
Seth MacFarlane Ted, Family Guy, Family Guy Presents Stewie Griffin: The Untold Story
Peter, Stewie, Brian & Quagmire on Family Guy
John DiMaggio Futurama, Tangled, Transformers: Dark of the Moon
Bender, Jake the Dog & more.
Kevin Conroy Batman: The Animated Series, Batman: Mask of the Phantasm, Justice League Unlimited
Batman in numerous animated DC shows
Phil LaMarr Pulp Fiction, Spider-Man 2, Futurama
John Stewart (Green Lantern on Justice League) and also Hermes on Futurama.
Tress MacNeille The Simpsons, Futurama, Teenage Mutant Ninja Turtles
Tons of voices on Futurama and Simpsons, but notable for Crazy Cat Lady!
BDub13 added Maurice LaMarche Futurama, Frozen, As Good as It Gets
Dee Bradley Baker SpongeBob SquarePants, American Dad!, Avatar: The Last Airbender
Wildlife in Avatar & Clone Wars + countless other background noises. Also the fish 'Klaus' in American Dad.