As bad as the main-event scene is, nobody deserves to be "buried". Besides, virtually every time they punish people they never come back (right, Swagger?)
If I had to pick anyone, it would be Kofi. That guy is stale as hell and really needs repackaging, but is your only cruiserweight presense on the main shows and would kill the tag division.
Sheamus got over instantly as a babyface, and is still over despite not feeling important in weeks. The Irish folklore thing is pretty entertaining, but as a face, I can't stand him in the ring. Why does every face only do about 5 moves, with a hokey/dumb buildup to his finisher?