Excellent writing Manju, the only thing I would say is that Tyson could not really change his style of fight like the boxers you named. In my opinion he had the best boxing skills of all the great "sluggers" (Dempsey, Marciano, maybe Louis, Frazier and Foreman) and in my opinion beaten them. Great boxers like Ali, Lewis and Holyfield could have beaten him but this is up to debate (and boy it has been debated).

I do believe that Tyson was mentally tough and would have given the greats a good fight in his prime and not wilted as he did later in his career when he lost his discipline and desire for the game.

I agree Foreman is the hardest punching heavyweight champion but Shavers the hardest punching heavyweight, which is probably the reason why he never became a champion because he relied on his power too much.