#4 Lars Sullivan

Lars Sullivan is a guy who has the potential to be the next Beast of WWE once Brock Lesnar decides to leave. His looks, his character, his fighting style, everything is intimidating.
With him making his main roster debut recently, it would be interesting to see how WWE handles this new monster in the town. But one thing that could hinder his main roster career is his limited mic skills. We have heard time and again how the main roster is not just about wrestling but also about entertainment, and with limited mic skills, Sullivan could face problems.
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Making him a Paul Heyman guy would solve this problem for sure. After all, we know how great Paul Heyman is with Beasts!
#3 Shinsuke Nakamura

Shinsuke Nakamura was all set to be the next big thing in WWE when he won the Royal Rumble last year and went on to challenge AJ Styles for the WWE Championship. At WrestleMania, after losing the title match, Nakamura turned heel.
But his heel turned was a disaster. A huge part of being a heel is to get the audience to hate you by delivering promos. Not being comfortable with English, Shinsuke wasn't really comfortable on the mic and that was very clearly visible.
Someone like Paul Heyman would have surely been a huge help for him as he could have portrayed him as the true threat that he really is. WWE can still pair them up if Shinsuke is sticking around with the company.