I will start the ball rolling with Arnold Schwarzenegger, who was mention in more than one episode, the one I recall is Howard talking about him in "A Leg up for Christmas"
Eileen WatkinsKing Farouk...ruler of Egypt !!....the girl who used to sit on Compo,and they used to roll her down the hill looked like King Farouk.....Compo said she fancied his mate...I can't remember her name...but I know a certain gentleman/gentlemen who will !!!!!.