Field Marshal Rommel
175 Panzer IV F2's produced.With only 130 KV-85's produced I don't think they will add them in there.
The Stug III f/8 is none too common either only 334 produced.
The only realistic way to add tanks is to add them if they were involved in the battle being portrayed.
Basically the Kv-85 is a better armored version than the T-34/85 since its gun had similar penetration to the T-34/85. Although unless Im mistaken all were destroyed before the T-34/85 cameout.