#1 Lars Sullivan

Before getting into it, he needs to go to Smackdown Live. I say this because lasts year during Survivor Series, Smackdown Live and Raw were raiding each other. During Raw's invasion on Smackdown, when Braun Strowman came out it was over for the blue brand. Lars can be the difference. Have Lars be Smackdown Live's monster and Braun be Raw's monster.
Having him on the Smackdown roster will most definitely even the playing field as far as that goes. It will also give Lars a chance to show this bigger audience what he's made of. Build him up as an unstoppable behemoth, an absolute mountain of a man. Then, at Survivor Series, him and Braun face to face in the 5 on 5 match, nothing better.
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Outside of that, push him long enough to where the audience can grasp what he's all about, then maybe a mid-card title run. Taking his credibility to the next level.
What if he did that to AJ Styles:
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