Yes but management and the management of the proper trainer for a particular fighter......Nick Wells was a brutal puncher but did not have the benifits of good training in the pro's...Bobick peaked in the amatuers and learned little in the pro's...Hearns had the fortune of running into Manny Steward and a Kid who had FEW ko's suddenly learned leverage and setting down on his punches and became a puncher...Henry Tillman got starched by Willie Dewitt from Canada but Dewitt is another travesty of poor, poor management....If Louis did not have Chappie, Ali, Angelo Dundee, Marciano, Charley Goldman...Duran Freddie Brown and Ray Arcel......OH what art...like the sisteen Chapel without Michalangelo
The difference is that the winner went on to be even more successful than the loser in contrast to your mentioned fighters. I think Lewis would dominate from 230 up, he just was the greatest and best fighter of this size. Bowe and Wlad would be second with not much between them. Interesting that with Vitali and Ike there are two would/could/should-type fighters in there even though there weren´t that many skilled/talented big men.
I think Bowe had good talent for a big man because he was a lightheavy in the amatuers and had to deal with speed but he was not dominant and just kept getting bigger,slower and then he ran into Golota....In the past the bigger men where giants but none of then stood out...Lewis was the best over 230 IMO...with Vlad, Vitali and Bowe up next not in order..Carnera,Willard,Buddy Baer, Valuev,Thompson,...there were plenty of Big guys but never before have they been anything great until Lewis in the Super X class
Small point - Manny actually trained Hearns in the amateur's too but taught him leverage and a few special Kronk power techniques when he started fighting pro.