Colonel Flagg from M*A*S*H was a complete idiot and always trying to get someone in trouble. He's my favorite guest starring character.
I think the 60’s shows were full of them. The ones on The Monkees were always good for a laugh too.
I agree - Professor Fate and Max from The Great Race - CLASSIC!Gotta be Dr Heinz Doofenshmirtz.
Professor Fate (Jack Lemmon) from "The Great Race."
And since I've been on a Luca binge, I'm going to count Ercole Visconti, too.