#1 Finn Balor
Finn Balor could move to SmackDown tomorrow and easily slot into the top of the card as one of the main-eventers. The fact that RAW has such a crowded upper mid card and the fact that the absentee Universal Champion doesn't defend his title more than a handful of times every year hasn't helped Finn Balor at all and he rarely had any good storylines in 2018.
However, he got the chance to show us what he was capable of when he faced Brock Lesnar at the WWE Royal Rumble. Balor is also one of the most popular Superstars amongst the WWE Universe.
If WWE move Balor to SmackDown, he can finally take his rightful place at the top of the card, where he belongs. I'd also love to see Finn Balor face Superstars like Randy Orton, Andrade, Daniel Bryan, and Jeff Hardy.