I don't think Hitler could possibly be compared with these men. Granted, he could have very well been one of the greatest speakers in History, but in the end he was a man ruled by ideology. When all of his generals said one thing, he said another: the irrational; and in the end, the results showed just how it was.
Considering we are the inheritors of the second WW, we no doubt will feel strong attachment to it; in probably the same manner inwhich the Romans viewed Hannibal and his war. However we are increasingly looking at WW2 in a far more objective stance, and the verdict is still the same: Hitler was a lunatic.
In the future I predict Hitler will be seen in a far less emotional way, but "evil" or "cruel" will always be among the most widely used adjectives for the man. I would say his initial years will attain the same praise they do today, but the results of the war have cursed his image for all time.