his best known roles include oil can harry, swifty and the narrator on "the new adventures of mighty mouse and heckle &amp; jeckle", ming the merciless on "flash gordon", the overlord on "blackstar", skeletor, man-at-arms and mer-man from filmation's 1980's cartoon "he-man and the masters of the universe", and the voice of prime evil in the 1986 tv series, filmation's "ghostbusters".