There are some nevertheless - I think also selling good in the theaters:
1. Enemy at the Gates (2001)
I don`t like Jude Law, but I like Ed Harris and Rachel Weisz

I will never understand why there has to be a love story or the german has to be ultra bad, but it is the way it is and it sells maybe good. The movie was criticized much in Russia because of the scenes of NKVD mass shootings and so to speak untruthfulness in regard to "one gets the gun - the other gets the ammunition - winner is who dies last". Not to mention the unrealistic flight path of the Stukas over the Volga. Very irritating that everything was repeated in the Call of Duty Shooter - series.
2. Defiance (2008)
Would like to recommend - not only because of Daniel Craig but because it is based on a true story.
That`s it from the russian PointOfView

3. Cross of Iron (1977)
Legendary Steiner (Jamers Coburn) and an officer (Maximilian Schell) in search for quick promotions - but again only a young russian POW and a lot of russian women soldiers (remember how they finished one german soldier?).
4. Hunde, wollt ihr ewig leben (1959) and Stalingrad (1993)
Two german movies showing the german side - and again a love story in war. This time between a german officer and a soviet female soldier. Both movies. Why? Is this a german thingy?
5. Drága Elza! (2014)
A new low budget movie (but well done) showing the story of an hungarian honved who gets captured by the Soviets and used to clear mines. Be aware of a super disturbing ending.
6. Mai wei (2011)
Korean soldier gets drafted into the Japanese Army, gets captured by the Soviets, forced to fight on their side, gets captured by the Germans and fights for them in the Ost-Bataillonen in Normandy. Strange battle scenes but a tremendous story - allegedly the true story of Yang Kyoungjong.
7. Idi i smotri (1985)
Highly rated soviet movie about a boy witnessing SS atrocoties in Belarus and turning literally into an old man. Another partisan movie showing uncompromisingly that there was collaboration with german forces.
And last but not least a "newer" russian war movie:
8. Rzhev (2019)
Uncompromising movie showing NKVD shootings, brutal meat-grinder battles and the hopelesness of the soviet front soldier. Die or die. You choose.
So I am finished - what are your tips?
I am shure I missed good movies which are not for the western masses out there...