#2 Samoa Joe

Samoa Joe is one of best pure athletes in WWE right now. Joe's size and strength along with his quickness give him legitimacy as a main event level star. His work in TNA, ROH and NXT speaks for itself and he could replicate this in WWE if given the opportunity.
In TNA, Joe had some incredible matches with AJ Styles, Christopher Daniels and Kurt Angle among others which got the Samoan over with the audience in a big way. Joe's work in Ring of Honor with Kenta Kobashi and CM Punk was some of his best work. In these companies, Joe displayed his ability to be a top-level performer and to consistently perform at the highest level.
John Cena's last PPV's name revealed by Kurt Angle? More details HERE
Since coming to WWE Joe has not hit the heights many were hoping. His short feud with Brock Lesnar had one of the best builds in recent memory and both of them told a great story in the lead up to a match. But Joe lost and never fully recovered since.
On the most recent episode of Raw, Joe challenged Roman Reigns to a match at Backlash. If Joe were to win this match, it could push him to a whole new level and give him credibility in the WWE.