Goubot

Adrian Dantley has been overlooked by the HoF for some reason. He was an insanely good scorer who was also incredibly efficient. He took a large portion of his team's shots, but he still shot in the mid 50s. He's probably overlooked because his best years were with middle of the pack Utah teams, but it's sort of understated how good those years actually were.

Trying to think of some others. Bernard King? His peak was incredible, but he was wracked with injuries. Artis Gilmore? He had a few years in the ABA where he was pretty much unstoppable (including an ABA championship, but the HoF doesn't really care about the ABA that much) and a fairly good NBA career as well. He's the career leader in field goal percentage at .599, and he's put up some great TS% numbers (actually leads the NBA in that, too).