#1.) Owen Hart
This is actually a well-known story, i.e, the reason why he has yet to be in the WWE Hall of Fame. Bret Hart has and still is vocal about Owen Hart (and the entire Hart Foundation) getting inducted into the WWE Hall of Fame. Unfortuantely, Owen’s widow Martha is the one who’s preventing it from happening.
Bret disagrees with Martha, and hopefully one day she’ll change her mind about it. There can be no induction of the Hart Foundation without Owen Hart.