When you talk about the world's greatest entertainer you have to say Al Jolson because there was no one like him. Only Judy Garland and perhaps Frank Sinatra got anywhere near him!
Jack BennyComedy itself is based upon very old principles of which I can readily name seven. They are, in short: the joke, exaggeration, ridicule, ignorance, surprise, the pun, and finally, the comic situation.
Jack Benny