Stars who had potential but never made it or were never used right

The title says it all. Which stars do you think had great amounts of potential but were either never used right and or never made it big?

My list:

Ken Kennedy: People were expecting him to win multiple World Titles. He had it all, charisma, mic skills, ring skills, etc.. but in the end, being injury prone pretty much fucked him.

Kane: Kane should have been a multi-time world champion and a consistent main eventer this far into his career. He plays heel and face really well, hes not that bad on the mic, and people love him... He's a believable main eventer and has had great fueds with Rock, Austin, HHH, Jericho, Edge, Taker, etc... hes been through it all, I really wish he would have had a real world title run by now, after being a fan of his for 11 years. His career kinda went backwards IMO, started out in main event winning the WWE title, then down to the mid card winning the IC, Tag, and ECW title.


One other person that should be on my list is Brock Lesnar. He was a great wrestler and left wrestling way too early, he could have been really big. But, his is having a successful career in MMA.

Lesnar left wrestling because he wanted to pursue football

The Brian Kendrick
Kaz (when they had him)