Jess Robin

In the 1980 remake of The Jazz Singer, Yussel Rabinovitch (Neil Diamond) defies his cantor father (Laurence Olivier) to become, well not a jazz singer, but a pop singer. There's a great scene where he plays his slow tender ballad "Love on the Rocks" to a Billy Idol-like rocker, who then turns it into a sneering punk rock song. Somebody find out that character's name!

See also Jack Robin and Jerry Golding.