Is there an idea body type for heavyweight boxing?

[R'hllorsMaDeuce]

No.

There is no ideal body type.

Only the ideal mindset. Boxing, like any combat sport, is not only a battle of fists but also a battle of wills.

You could have the best physical attributes in the world, but if you have a weak will then you will crumple up like a dead spider when your stronger willed opponent dominates you from start to finish.

Yeah but, two guys fighting with the same level of will, same fundamentals, same intangibles - the one with the 6' height and 10' reach advantage will usually win 9 times out of 10.