FWIW, Patrick McGoogan was the Columbo villain in four episodes. I don’t think anyone else ever did more than two.
Nicol Williamson was the fellow in that episode. (Columbo” How to Dial a Murder)
Yeah. McGoohan did four.
Jack Cassidy did three. He killed Malloy. Was an ex-Nazi magician. And was a publisher who had Mickey Spillane killed.
Robert Culp three times, too.