Herman Gruenwald
This was a case where the author had come up with a sketch on his own that he wanted to use for cover art. The visual metaphor of a single shaft of wheat figured prominently in his story of surviving Auschwitz and his life after the war.
I felt the same idea could be expressed in a more sophisticated and poignant manner and in the end, after a fair amount of convincing, he accepted my version. His tattoo number was moved from the front cover to the back.