The problem is, you think that Hitler was a great person, besides the holocaust. What's your opinion on Franco?
I think that, like all areas of life, the issue is far more complicated than the black and white that modern history would like us to follow.
Hitler had, as with any men, his good traits and his bad traits-- it just so happens that his bad traits were really, really horrible.
So yes, I think that there was some good in Hitler, in some areas. Certainly not all areas, and certainly not a lot of good. But some.
As for Franco, his reign would have been largely free of purging or persecution if it hadn't have been for some complicating events during the Civil War-- Franco, however, seemed more a man in search of an ideology that supported his authoritarianism more than an ideologue himself. If the Communists had financed him and aided him rather than Italy and Germany, I'm sure he would have sided with the left politically.
This is similar to Castro in Cuba, who only became pro-Soviet after the US more or less ignored/alienated him.