Oh was best known for the voice of Fa Zhou in Disney's "Mulan" and the direct-to-video sequel "Mulan II". He has starred in many movies, and also acted in television series, including "MacGyver", "M*A*S*H," "Charlie's Angels", "Airwolf", "Magnum, P.I.", "Hawaii Five-O", "Kung-Fu", "Zorro", and "Touched by an Angel".