I would take Vitali Klitschko in an all alive tournament in paradise....that guy was amazingI will say that Mike is a very small heavy, so even though he is 3rd best of his era, his alltime rating is still strong because he was almost fighting a weightclass up in theory. Like Mike in his prime was probably more of a cruiserweight sized guy, maybe if Mike was at cruiser fulltime he would be the cruiserweight GOAT and maybe top 10 alltime, but due to being the 3rd best heavy, he is more like top 40 alltime or so.
I think Lennox is the heavy GOAT in terms of skill and if you had a tourny of all them in their prime , all alive like a tournament in paradise, Lennoz is the guy I pick to win.
Mike really was a pretty small HW...those short arms really hurt him against big dudes like Lennox