I've always had the idea in the back of my mind that WWI and especially WWII could have been relatively one-sided. In WWII, at least, it was the Nazis and the Italians in the European theater against other, relatively predominant powers with their luck screeching downwards the longer the war goes on.
What is the best possible result that the Germans can hope for from 1914 to 1945, or rather the beginning of WWI to the end of WWII (if you want to change dates)? All PODs or butterflies must be feasible and it cannot be a Naziwank or an Alliedwank.