Who has the brightest future out of the current Heavyweight Champions?

[and the NEW]

Almost 8 months on and Joshua is just building more and more momentum. The guy is at a level now that I feel he could take out any of the heavyweights, and he is still improving!

He has solid fundamentals. He can push forward or counter. He has good judgement of the distance. He has good timing. He doesn't rush. He doesn't lunge, keeps good balance. Has big power. Paces himself. He has very few holes in his game and he is only continuing to refine it.

Wilder, other than a good jab and power, has so many holes.