#3 Sami Zayn
Sami Zayn's rise as the heart and soul of NXT is a testament to his incredible in-ring ability and versatility. The Underdog is respected by everyone as a performer, and his natural babyface look made him more appreciable before transitioning to the main roster.
His first main-roster match was an instant hit when he clashed against John Cena for the US Championship, and while he did perform exceptionally well in front of his hometown of Montreal, the former NXT Champion injured his shoulder.
Despite injuring his shoulder, Zayn went on to finish the encounter successfully and concluded the bout the way it was planned to be.
While many saw his performance as an outstanding one, his injury led the management to be more cautious with him, that led his main-roster debut to be completely dissatisfying.
Although he's working in a good position today, Sami is still far from being pushed into the main-event scene, and is still yet to win gold in the WWE.