Harry is Derek Smalls in Spinal Tap, Mark Shubb in The Folksmen, and Mr. Burns on The Simpsons.
Jackie DeShannon - "Put a Little Love in Your Heart"
It wasn't her biggest hit as a songwriter (that would be "Bette Davis Eyes"), but "Put a Little Love in Your Heart" had a family connection for Jackie.
The Garbage drummer/songwriter produced the Nirvana album Nevermind, and Smashing Pumpkins' Gish and Siamese Dream.
Matthew Wilder - "Break My Stride"
Wilder's hit "Break My Stride" had an unlikely inspiration: a famous record mogul who rejected it.