#4 Finn Balor
One man who was pushed to the moon when he debuted on the main-roster is Finn Balor. The longest reigning NXT Champion felt like an instant success when the company was rumored to be pushing him as the face of the WWE.
While that speculation might not be true, a lot of the fans were genuinely surprised when Balor defeated Roman Reigns clean on his first night on Raw.
The Demon King went on to clash with Seth Rollins for the inaugural Universal Championship, the former suffered an unfortunate shoulder injury during the encounter.
Considering that he did show some willingness to get back in the ring and complete the match he was supposed to win showed a lot about his character and determination.
However, he was coerced to relinquish the title next night on Raw, and his career has never been the same since that night.
Balor continues to be a mid-card performer, but is far from being pushed as a headline act on Monday Night Raw, and his unfortunate injury might have cost him a lot.