#4-3 The Ascension
The Ascension is one of those teams who had a successful run on NXT but failed to create much of an impact on the main roster. Since the day they made their main-roster debut, they are not been booked very well. Most of you will probably find hard to realize if they are currently performing on Raw or SmackDown Live.
I guess, probably because of lacking what a tag team needs they never became The Tag Team Guys, which they should have. Due to this they were never really seen in upper card and failed to live up to the hype.
#2 Dolph Ziggler
Former I.C champion, Dolph Ziggler is having a decent run on the main roster now after being featured to the lower card and becoming completely irrelevant. The case with Dolph Ziggler is believed, he never really reached to his full potential and emerged as a true main eventer which he should have over the past years.
I guess, the things with Ziggler now might change as he is now paired up with Drew McIntyre and Braun Strowman in a feud with The Shield.