#3 Bo Dallas
Bo Dallas became the third person to win the NXT Championship after he defeated Big E on an episode of NXT in 2013. He would go on to hold the NXT title for an impressive 260 days which was then the longest reign before it got broken by Finn Balor and eventually Adam Cole who is the current NXT Champion.
Dallas's father is WWE legend Irwin R. Schyster and his grandfather is Hall of Famer Blackjack Mulligan. His two uncles Barry and Kendall Windham were also professional wrestlers, so, it can be said that professional wrestling was in Dallas's blood. Some may not know, but former Universal Champion Bray Wyatt is also his brother.
After he got drafted to WWE RAW in 2014, Dallas began a winning streak until it got broken by R-Truth. Since then, Dallas has not been able to replicate the same amount of success that he achieved in NXT even though he has been a former RAW Tag Team Champion and a 24/7 Champion.
Dallas and Curtis Axel acted as lackeys for The Miz during 2017 where they were known as The Miztourage but after The Miz was drafted to SmackDown in 2018, they remained on RAW and rebranded themselves as The B-Team where they became RAW Tag Team Champions after they defeated Matt Hardy and Bray Wyatt at 2018 Extreme Rules.
Dallas has rarely appeared on WWE television after Axel and he were drafted to SmackDown as a part of the 2019 Superstar Shake-up. For a person who held the NXT Championship for such a long time, it is hard to believe that he has not made much impact on the main roster.