I'd have to go with Bray, at the top. I love the gimmick top to bottom.
Next would be Cesaro, because he can go in the ring; he has the look WWE likes, the only thing he is missing is the mic skills. I think he should have been the Paul Heyman guy.
Third is Fandango; I like to let this work themselves out, and Fandango has been playing his role perfectly.
Ryback, Shield, and Big E, round out the rest. For different reasons.
I don't know if this counts, but 3MB, more specifically Heath Slater. He is never going to win the big one, but whenever he is out on stage, I can't help but watch. He seems to be out there having the time of his life, even under such a shitty gimmick. Plus he has one of the sickest superkicks. Whenever they actually let him shoot one off, it instantly is loud as hell.