Richard Steven Horvitz
Highly popular voice actor. Is usually type cast as very crazy and dimwitted characters who tend to do a lot of screaming. If they're small, nasal, manic, and slightly hammy, there's a good chance Richard Horvitz is involved somewhere. His best known works include the voice of the original Alpha 5 in Mighty Morphin Power Rangers, Power Rangers Zeo, and Power Rangers Turbo, Raz in Psychonauts, Billy in The Grim Adventures of Billy and Mandy, Daggett in The Angry Beavers, the Berserker in The Darkness video game, the title character Zim from the show Invader Zim, Rodney the Squirrel in Squirrel Boy, and as Orthopox in the Destroy All Humans! series. While many of Horvitz's characters scream, he has said himself that the hardest role he's ever had to play was Zim, since Zim's speaking voice is screaming.