Richard McGonagle
From Wookieepedia, the Star Wars wiki.
Richard McGonagle provided the voices of General Grievous, Kit Fisto, Orvos, and Harvos in Season 3 of the Star Wars: Clone Wars cartoon. He also provided the voice of a Rebel soldier for the computer game Star Wars: Rogue Squadron II: Rogue Leader.
He also had a bit part in the Lucasfilm cult/camp film, Howard the Duck.
