Dont you think that this poll is, well, a bit to much? I know you know your stuff but I don't even know what these stuff is. I mean, wow.
Stahlhelm + Feldgrau coat like in the example you provide is what I see the main Ostheer infantry wearing. Basic infantry might just have a ski cap instead of the Stahlhelm.
I don't really think there is a point of infantry with multiple type of clothing. It will look strange, you should include infantry uniform set not individual clothing. Its confusing and not a lot of us are expert in what they are wearing. I agree with the black uniform of the german use in Stalingard, It look badass and very distictive.
Reminds me of a video I just saw about German Uniform versus soviets in Stalingrad. Poor Germans, most of them were still in there summer uniform .