This is back? Let's see...
Roman heel, obviously.
Big E heel after the break up of New Day...or...Kofi. Because he actually can be good if you give him a shot and he is the longest serving WWE member of the three, give him a decent midcard/upper midcard heel run. Better than going back to his "Boom Boom" character right away.
Rusev can be a good face as he is lovable. :rusev:
AJ Styles as a face eventually. While his heel turn gave new life to his character, the fans love him anyways, so if they let him keep some of his character, the fans will cheer him anyways.