I know that John Fiedler (Blueprint For Murder) was in at least one. And I'm guessing that James Milholland (Publish Or Perish) was in at least one, since he was all over TV.
Hah, yes John Fiedler was another of those actors who was in "everything"!
Columbo and Bewitched overlapped, when Columbo's first season was first aired, it was Bewitched's last.