Obviously MVP. I might get some heat for this but...Cryme Time were nothing, the only reason they were popular was because of their gimmick (which was pretty racist if you ask me), and they were decent in the ring. MVP though..he can make people hate him, AND he can go in the ring. I have to give a thumbs up to WWE on actually making MVP a star and i'm sure he'll be main eventing (aka. Jobbing to HHH or Cena) in a few years
EDIT: wait a minute....didnt MVP debut in 2006? yea..he did because he wrestled Kane in that Inferno match last December, which was 2006. Oh well, I still pick MVP