Played a great (hilarious) monster in Young Frankenstein as a younger (and already bald ) man. Fine actor. Also remember when he did 'Dueling Brandos' with John Belushi when he hosted SNL. Great stuff. Will miss him.
I believe he was also the investigator in that smut movie 'Hardcore' with George C Scott back in the late 70's, I think that was the first I remember seeing him.
He was one of those actors where you would never think he was playing a role, every role he played seemed to be made for him cause he made it his own, great actor...