If I believed in the Rock and Roll Hall of Fame as an institution or even an argument settler, I would insinuate myself as one of their exhibit planners and make sure there was a "Worst Dads in Rock and Roll Hall of Fame" created every June. Why? Because for every bit of musical genius cluttering up that Cleveland carbuncle, there's a rotten patriarch behind the legend doing his best to lower his son or daughter's self-esteem and arguably inspire his best work.
Because of that last stipulation, the spawning of a rock legend, we can handily eliminate such celebrated do-wrong daddies as Papa John Phillips, who sexually abused his own daughter Mackenzie, turned her on to drugs at an early age, let Mick Jagger babysit her and perhaps most cruelest of all, had her replace hottie stepmom Michelle in a Mama Cass-less reunion of the Mamas and Papas.
And we can also eliminate those questionable calls you people are already calling out, like Billy Joel (who inadvertently forced daughter Alexis into years of ridicule when the gene pool gave her all of dad's good looks instead of supermodel mom Christie Brinkley) and Eric Clapton (oh, you people are cruel.)
Let's count 'em down, in order of severity: