Ian James Corlett
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Ian James Corlett (born on August 29, 1962) is a Canadian voice actor.
He was the original English voice for Goku and Master Roshi in the Westwood dub of Dragon Ball Z. He voiced the two characters in the first 49 episodes (37 in edited episode numbering), as well as in the edited TV version of Dragon Ball Z: The Tree of Might. He was also previously the voice of Monster Carrot in the original Canadian dub of Dragon Ball. The reason for his departure from the role of Goku was reportedly due to disputes over non-professional conduct during and after some recordings. It was also said that he quit due to a lack of compensation for Goku's several trademark yells.