Dee Bradley Baker

Dee Bradley Baker (born August 31, 1962) is an American voice actor, known for roles such as Dad from Cow & Chicken, Numbah 4 in Codename: Kids Next Door, Ra's al Ghul in Batman: Arkham City, Daffy Duck in Space Jam, Dr. Octopus & Mr. Fantastic in Lego Marvel Super Heroes, Cinnamon Bun in Adventure Time, Carnage & The Lizard in the 2000 Spider-Man Game, Nightcrawler in X-Men Legends, Lord Cedric in W.I.T.C.H., Brainiac in Lego Batman 3: Beyond Gotham, the ever lovable German Fish Klaus Heissler in American Dad!, the Techies in Dota 2, as well as characters in Star Wars: The Clone Wars and Star Wars Rebels (including ALL of the clones), The Grim Adventures of Billy & Mandy, a few of the Omnitrix aliens in Ben 10 and Ben 10 Omniverse, pretty much ALL of the Omnitrix aliens in Ben 10: Alien Force and Ben 10: Ultimate Alien, Spongebob Squarepants and Olmec in Legends of the Hidden Temple.
Much like Frank Welker, he can "voice" non-talking animal characters really well, such as ALL the animals in Avatar: The Last Airbender and The Legend of Korra, Waddles the pig from Gravity Falls, Wildmutt in all four Ben 10 series and Perry the Platypus from Phineas and Ferb.

