#5 Finn Balor

In 2016, Roman Reigns was effectively suspended for 30 days over wellness policy violation and gracefully accepted the consequences that came after.
With WWE going all-in with the brand extension at that time, there were significant rumors of the company wanting to push Finn Balor as the new face of the company
Female superstar says she inspired John Cena turning heel HERE
Moreover, the Extraordinary Irishman was presented like a top star when he made the transition from NXT to the main roster and went on to outshine The Big Dog on his very first night on Monday Night Raw.
Balor's victory sealed his ticket to SummerSlam, where the former NXT Champion slayed Seth Rollins and made history by becoming the First-Ever Universal Champion.
Although Balor did suffer an unfortunate injury that night, the fans expected him to return with a bang and claim his spot back to the top. Unfortunately, nothing of that sort ever happened.
Even if you look at Balor today, the man can do wonders between the ropes, but has never reached his full potential on the main roster regardless of having a 'W' in his column over the biggest star in the company today.