My mom LOVED that show, which meant I was occasionally forced to watch it. He was my favorite part of it. He was funny and quirky and managed to make his parts interesting to a person who wasn't interested in the show.
I heard him tell the story of getting on a flight once, when someone across the aisle recognized him (he was the Angel of Death on the show) and began freaking out, claiming she had to get off the plane. The stewardesses calmed her down, but he was amused that his role got such a reaction... Rest in peace.