As Idea maybe, for italians, AUSIES or hungary/romania. But, I already see many problems.
1st. Seriously - comanders ONLY for money.. as if games isn't too overpriced already.
2nd - it makes Me to do one look to see developers of this project doesnt know history well, or just dont care about it.
A) Ausies commander for USF (seriously, giving ANZAC and Commonwealth nation to US? , dont you know about EL Amein), same for Canadians.
B) Hungarians/Romanians for OKW....... OST must be the target faction. And they sorta are implemented in Osttrupen doc.
C) Ukraine and Belarus...... One thing u must know, in those times they were only countries in paper, so Soviet Union could get more votes in security council, and even that was after war. Other than few indirect division names there aint any units resembling Ukraine and Belarus. + There were many nationalist partisans fighting both Germans and SU.
D) FFS even Russian doc for OST can be possible by this premise you are making, - see Vlasov and Russian liberation army
https://en.wikipedia.org/wiki/Russian_Liberation_Army
E) The fck is this gaming roll pool, make it better - healer/damage fealer/control (what is this - fantasy RPG?) Indirect fire/ elite infrantry/ infiltration units/ offmaps / anti tank weaponry/ would be better option.