#4 Killian Dain
So basically what I'm suggesting for Killian Dain is the run that he should have had with SAnitY, in the Wyatt Family. There are few men as big as Dain who move as fluidly and as effortlessly as he can. However, his run as a part of the faction was nixed and they got no TV time.
The Miz took on the trio right before WrestleMania and even emerged victorious in the match, but in doing so he took away all of SAnitY's heat. And now the trio is no more, with Wolfe having joined NXT UK, and Eric Young and Killian Dain on two separate brands.
I think a fresh start for Dain may be the right way to go about things and a pairing with Wyatt will give him the credibility that he has so craved. He could even take the Luke Harper spot as Bray Wyatt's new right-hand man.