#3. Former WWE NXT Champion Adam Cole
As we now know, Adam Cole has moved onto greener pastures as he is now reunited with his Elite family in AEW. However, Cole left his mark on the NXT brand, especially during his run as NXT Champion, where he would eventually become one of the very best to ever hold the championship.
Adam would officially sign with WWE in the summer of 2017 and make his debut at NXT Takeover: Brooklyn III. This was when Cole made the run-in attack on Drew McIntyre, who was fresh off of his victory over Bobby Roode, to become the new NXT Champion. This was also the night where The Undisputed Era was officially formed, with Cole leading the way.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
The Undisputed Era would wreak havoc all over the NXT roster, leading up to Adam Cole's fatal 5-way victory, which earned him a shot at the NXT Championship at NXT Takeover: New York. Unfortunately for Cole, he was unsuccessful in his title bout against Johnny Gargano.
But he would soon get revenge as he defeated Gargano at NXT Takeover: XXV, where he won the rematch to claim the NXT Championship, enroute to becoming the longest reigning NXT Champion in history. Cole would hold the title for an amazing 403 days before finally losing the championship to Keith Lee at the Great American Bash PPV.