Well, this is possible, if a bit contrived

However, we may do it with something less extreme.
We are already assuming as a main POD that Hitler is bestowed with a bit more political insight as to avoid declaring war to the USA, which IMO it is the precondition on Germany having a successful WWII outcome.
Partially retracting my previous statement, on further reflection on your argument, I now state that it is possible that such a more insightful Hitler may come to see the wisdom of offering minor EuroSlavic nationalities of the Soviet Empire a decent place in the German Empire, if nothing more than what he was willing to give to Western Europeans, i.e. vassal states of the Empire. He may do so both out of conveniency (following the M-R precedent) and because Nazi racial theory offered loopholes to justify giving quasi-Aryan status to Ukrainians (they had been colonized by Vikings in the Dark Ages) and the Baltics (colonization by the Teutonic Order in the Middle Ages).
If he implements such a moderate policy, the Soviet regime is really doomed. Stalin's genocidal terror regime has been so bad on Soviet nationalities that they were quite willing to flock under Nazi banner if they offered anything significantly better than forced labor, famine, and terror. IN OTL they were radically disillusioned and forced to choose the evil they knew, but ATL, a deal that offered the peasants land property rights, religious freedom, decent subsistence, and existence as a vassal national state, with eventual Germanization and some German colonization, well, that would have won all the Baltics, Ukrainians, Caucasis, Belarus etc. for good.
This would have meant no partisan problem in German supply lines, freeing troops and reducing logistical problems. And additional troops from Slavic volunteers for the Wehrmacht. OTOH, this also means Stalin is much less successful in playing Slavic nationalism to mobilize the people. If it becomes Nazi vassaldom vs. Communist terror, many Soviet citizens will remain apathetic or even become openly rebellious as they see a chance of shaking off the Bolshevik yoke. The Soviet war effort is hampered, and a significant part of the amry must be used to suppress anti-Communist revolts.
In combination with USA out of the war in Europe and a trickle of Lend-Lease aid to USSR, this creates the conditions for a German total victory on the Eastern Front. Germany will win the Battle of Stalingrad and conquer the Caucasus in 1942. Germany has solved its oil problems and Russia has now one of its own. In 1943, a successful pincer thrust on Moscow and the Russian heartland becomes feasible. Instead of the Brest-Litovsk II peace deal, now it becomes feasible for the Wehrmacht to push the Red Army beyond the Volga, or even beyond the Urals. Logistic overextension becomes much less of a problem for the Germa ns if they don't have a partisan problem. Losing Ukraine, the Moscow region, and the heartland, means the Soviet Union is doomed, as they now lack the manpower or the industrial resources to sustain an all-out one.front war. Russia is shrunk to a Siberian/Central Asian rump, which won't be a problem to Germany for a generation.