Hey! He was also in Conquest of the Planet of the Apes and The Naked Gun: From the Files of Police Squad!
Seriously though, I'm guessing he would consider it to be one of his top roles. I know he was very proud of how in shape he go to do it (that really was his chest despite the rumors).
What's awesome was he still kept getting voice-over roles once he was confined to a wheelchair for the last years of his life.