John Dimaggio Best known as: Bender on Futurama, Jake on Adventure Time.
Best known as: Both Ren and Stimpy, Phillip J. Fry on Futurama, Bugs Bunny in Space Jam (1996).
Best known as: Bobby Hill on King of the Hill, Milo Oblong on The Oblongs.
H. Jon Benjamin
Best known as: Ben on Dr. Katz, Bob on Bob’s Burgers, Coach McGuirk on Home Movies, Sterling Archer on Archer.
Best known as: Rocky J. Squirrel from the Rocky and Bullwinkle Show, Cinderella, Cindy Lou Who from How the Grinch Stole Christmas.
Best known as: The Brain on Pinky and the Brain, Orson Welles on both The Critic and The Simpsons, Lrr and Calculon on Futurama.
Best known as: Hayley Smith on American Dad, countless voices on Family Guy
The fact that she is also Seth MacFarlane sister is of small note.
Best known as: Homer Simpson, Mayor Quimby, and Krusty the Clown, and many others on The Simpsons.
Click here for the 8 http://tdylf.com/2013/01/04/eight-awesome-voice-actors-and-what-they-actually-look-like/#more-10551
and you might also want to
Click here for a Star Wars radio play with some unusual voices