Well none of that said improvement occurred with Cena. He was carried in most of his matches. So I would keep Wyatt their. His promos alone heading to mania with taker were epic, he carried that whole feud all on his own. His in ring work is also underrated. Pity he doesent get a chance to show it that often.Seth Rollins
Runners Up: Kevin Owens, Roman Reigns, Bray Wyatt, Brock Lesnar
I'd also throw John Cena in there but that's my top 5. Cena would be 6.
If we're talking about an overall improvement/in ring standpoint, if we're talking about booking or like kayfabe just remove Bray Wyatt and add John Cena.