Tyson. No contest. Tyson knew how to box and had a wide variety of punches at his disposal. All of them powerful. Wilder is still a novice fighter with a lot to learn. He's essentially a prospect with a great management team. And I'm a Wilder fan.
Wilder's straight right may be more powerful than any single Tyson punch, but Tyson had a greater variety and vastly greater combinations.
Watch Tyson Botha to know even a shot Iron Mike had devastating power. Wilder is nowhere near that level.