While the Germans used vast numbers of slave laborers from countries they had occupied, that really wasn’t my point. Among the what-ifs of WWII a common what-if is what if the Nazis weren’t such umm - Nazis on the Eastern Front and recruited Russian/Eastern manpower against communism. The obvious problem with this what-if is that the very precepts of Nazism gets in the way. The other problem is that despite this they actually did utilize this manpower on a massive scale not just as slave labor but in the military. For example, fully 1/3 of the rifle strength of the 709th division that fought from the D-day landings at Utah beach to the fall of Cherbourg were Ost (East) battalions formed from Russian/Eastern manpower; most German infantry divisions in France by this time had at least one Ost battalion attached. From here on Osttruppen:
There’s a pdf here listing the rather lengthy number of German Ost troops on the Eastern front on 25 March 1943.
And it isn’t simply a matter of utilizing manpower. A credible Nazi alternative to Stalin’s overlordship would have made the Communists’ struggle infinitely harder in any number of ways - it could have undermined the great swelling of patriotic fevour which, to a large extent, enabled them to stave off defeat.
Of course, the words “credible” and “Nazi” don’t go well together - it is an amazing fact you detailed that, in spite of their murderous bigotry, the Nazis were still able to recruit some more or less willing help from some eastern europeans. Imagine what could have happend if they had not behaved with murderous bigotry.