#2 Matt Riddle

Matt Riddle has taken NXT by storm. With a good MMA background and great wrestling ability, he is an athlete who is tailor-made to achieve great success on the main roster.
Well, the way things have been going lately on the main roster, it's not safe to say that any NXT star can become an overnight success. But if you have got the talent and persona like Matt Riddle, you just might.
The King Of Bros has done well enough in NXT ever since making his debut, which is a good thing.
He is still a fresh talent in NXT, so don't expect to see him on the main roster before WrestleMania 36. Riddle needs to stay down in NXT as there still some work that needs to be done when it comes to his mic skills.
The career graph of Riddle seems to be going in the right direction and it won't be a surprise if he ends up being the NXT Champion one day.