#2 Rusev
Rusev is not happy about his creative direction and he is not quiet about it. The Bulgarian Brute has been lingering in the undercard ever since WWE decided to split the fan favorite "Rusev Day". Without Aiden English, Rusev has never been the same.
The Bulgarian Brute has been outspoken about his dissatisfaction with his booking. He has been working out harder than ever before yet Vince McMahon ignores him for some reason. The matter is made even worse since both Rusev and Lana have been dropped from Total Divas as well.
With the lack of opportunities, Rusev may find it tempting to leave WWE once his contract expires. With All Elite Wrestling looking forward to signing the best talents in the industry, Rusev could easily choose AEW. However, WWE could convince him by giving him an opportunity to fight for the WWE Championship at Elimination Chamber 2019.