#6 Finn Balor
Fergal Devitt, Balor's real name, hails from Ireland. He joined NXT in 2014 and had a quite a successful run in the developmental brand.
He is the longest reigning NXT champion at 292 days and has also won the Dusty Rhodes Tag Team classic with partner Samoa Joe.
One of the founding members of Bullet Club, Balor was a highly accomplished wrestler in NJPW.
Upon his debut on the main roster, he quickly got involved in the WWE Universal title picture, even defeating Roman Reigns on the way.
Balor biggest accolade was winning the Universal Title just 27 days into his main roster debut, as he became the first wrestler to win a top championship in his debut pay-per-view appearance.
Since then he has drawn quite a flak, mainly due to poor booking but with Triple H very high on his abilities, things might get better in the near future.