#1 Brock Lesnar
Brock Lesnar has been one of the most controversial Superstars in WWE in the past few years. His elite status in the company isn't pleasing for both the fans and fellow wrestlers in the locker room. All things must come to an end and many feel the same should be said for Lesnar's time in the WWE, as of now.
The Beast Incarnate's contract with WWE is rumored to expire soon after Wrestlemania 35, and WWE shouldn't bother renewing it again. Brock Lesnar is an expensive commodity, and at a time when Superstars have options outside WWE, keeping him for too long will not set a good example. Lesnar can still be useful for the company, but right now he is too expensive to afford. The Conqueror's departure could actually do wonders for WWE, as it will give more opportunities to other superstars at the top of the card.