#1 Finn Balor
Finn Balor has progressed exponentially since his time as Bullet Club leader in Japan. He became the first Universal Champion, and won the NXT Championship (see video below). However, recently his talent has been underutilised by WWE. Perhaps Balor has an upcoming story of high value. Nevertheless, he deserves better.
With the return and potential in-ring competition of Shawn Michaels, the future looks bright for stars like Balor. In the ring, Balor is safe and graceful. Moreover, he can perform with almost anyone successfully.
Michaels has years of experience which could greatly benefit Balor. If WWE decided to match them together, it would be epic. The clash would arguably be the biggest dream match of the decade.