Dammit, everyone is misunderstanding the OP. OP is pondering what a force the 3rd Reich could be if he became leader and STOPPED all the genocide and stupid Hitler shit from ever occurring, however, I think that if the Nazi's hadn't gone to war with half the fucking countries on earth then they would have become too powerful, developing the atomic weapon first while the US sat with it's horrible pre-war military, and i don't know what become of the USSR, maybe them and the US would actually be friends?
The USSR and US wouldn't of been friends. See Red Scares of the 1920s.