#2 Bo Dallas
When you look at the history of wrestlers who have held the NXT Championship, every single one of them has managed to achieve something on the main roster apart from Bo Dallas, who was one of the original holders of NXT's top prize.
Whilst the former champions have had varied success, from the top levels of Seth Rollins and Kevin Owens down to those who have only had mid-card title runs like Bobby Roode and Samoa Joe, all of them have done more than Bo.
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That has been a big shame because NXT hadn't taken off in the way it has now during Bo's reign. This meant a lot of fans never got to see him at his best, with his tremendous Bolieve character that got over so well as an annoying heel.
On the main roster, Bo has mainly been used as a joke, in comedic roles which is where he is stuck now as one half of The B Team. But he can offer so much more. A return to NXT could allow Bo Dallas to rethink things, creating a brand new character that could stand alone once again, proving just how talented he really is.