That is a wonderful image. Just a pity the man in front was facing completely the other way. Even if his head been turned slightly. As for the man whose face we can see, it's a face full of character. To separate it out from the background, try selecting around his face and applying a curve (or use levels if you prefer) to lift it a bit.
Ole - Do you think that works?
I agree. I think it is an excellent image.
It's getting close to looking unnatural, but you've stopped it on the right side of the line. That does strengthen the image. Very well done.
I think the last version nails it. Fine image.