#1 Samoa Joe

He is going to be fresh out of a feud with the anointed one Roman Reigns soon, and WWE must strike the iron while it's still hot.
Samoa Joe is a big deal. WWE would be fools to not treat him like that. He has excelled on Raw, cutting scathing promos and just being a heel who can beat anyone up.
Breaking Vince Russo and Jim Cornette update HERE.
His evisceration of Reigns' accomplishments on Raw currently shows the amount of talent he has on the mic, and his in-ring work was never in dispute.
The exact same can be said for Styles, who has excelled in-ring and on the mic. Putting him up against the Samoan Submission Machine would be absolute gold.
He knows he can choke people out to win, and he won't stop at any cost. Styles is a hard-fought champion who will retain his title at any cost.
His fighting spirit was on display against Brock Lesnar at Survivor Series 2017, and that is a route that WWE should take with these two.
Styles and Joe can take this feud wherever they want, that is the level of their supreme talent.
They could maybe break out a submission match to truly establish who is the better man. They could also plausibly have a No DQ match because that is the only way these two can truly let all the animosity out.
These are just a few of the million ways WWE could execute this feud, and boy is that exciting.