Erik had a decent look, but not much else. Greg Gagne on the other hand was actually a very good worker, and was an underrated tag team wrestler. He just didn't have the same genetics as his old man. Thankfully Verne never put the world strap on him, or he would no doubt be the #1 all time nepotism winner.
A couple more to add:
Angelo Mosca Jr. - they actually pushed this kid into winning the NWA Mid Atlantic heavyweight title. Lets look at some title holders before him- Flair, Wahoo, Valentine(Greg and Johnny), Piper, Steamboat, Koloff, Iron Sheik, Brisco. Yeah, not sure "Mosca Jr." belongs on that list. T
Mike and Chris Von Erich - Much like Greg Gagne, neither Mike nor Chris(especially) inherited their Dad's genetics. Sure, Kevin, Kerry and David were great, and absolutely deserved their push. Each excelled in at least one category - looks, mic, work but Mike and Chris just didn't. In particular, Chris was a midget who had no business anywhere near a ring.
David Flair - Where to start? For one, it never seemed to me that David even wanted to be out there. He looked lost and bored most of the time. He obviously was just doing it to please his dad. His complete lack of charisma was even more so magnified by comparisons to his dad. He ended winning both the WCW US Title(after Steiner was stripped of it), AND the WCW World Tag Team Titles with DAFFNEY, when they defeated Kevin Nash and Scott Steiner. What a joke