He is best known for voicing Raphael in the 1987 "Teenage Mutant Ninja Turtles" series, Jafar in Disney's "Aladdin", Dracula from "The Grim Adventures of Billy and Mandy", King Dedede from "Kirby", Zordon from "Power Rangers", Really Really Big Man from "Rocko's Modern Life", and Vernon Dursley from the "Harry Potter" films.