I have such a hard time thinking of Dalton Castle as a wrestler still. For years, he was the goofy DJ at my local rock station (Q103 - formerly, 'The Edge,' in upstate NY). He's good in so many ways, but it's hard to separate the reality from the fiction.
Making goofy skits/videos like this one:
I'd like to see Cage or Willie Mack brought in to put some power-guys onto the roster for body variety and to hopefully replace less talented 'big guys' like Ryback.
The Young Bucks, Tama Tonga, and Bad Luck Fale to reunite the OG Bullet Club with Balor, Anderson, and Gallows.
Ricochet's beautiful high flying is always welcome...though I don't know if he'd get lost in the Neville, Style, etc.... shuffle
I'd say Kenny Omega, but there's no way his character ever translates onto WWE TV the right way. Way too over the top.