I feel Wlad would have beaten a slew of heavyweight's. Right now he is the best and most hated fighter. I don't know why this is,he is a class act in and out of the ring.HE stops just about everyone he has faced in recent years. People are still saying he can be knocked out or beaten by whomever. But the fact of the matter is RIGHT NOW he has not be in any type of trouble or even knocked down in damn near five years. He has consistantly gotten better under the tutalage of E-man and he has taught him really to keep everything in his range and not mix it up.Ultimately leading to a TKO or stoppage.

My list of heavyweight's who would give Wlad problems
Lennox
Foreman
Tyson ( before Bruno I)
maybe Larry Holmes early on but would wilt under the weight, power,and accuracy.
A prime Cassius Clay,maybe but I think would wilt also under the weight and power, (not the Ali who sat on the ropes he would be a sitting duck and yes be stopped).
Styles make fight's and these are the guy's I think would give Wlad problems. All of the old time fighter's like Dempsey, Marciano, Louis, are just to damn small.