Well done sir, tis sure is a wonderful image. Looked at this for quite a while, I always loved when people put enough detail in the drawings for one to admire. And a golf-clap to you for the drawing of TF2-content. The only critique one might offer is the apparent lack of hats on the spy, as it makes him appear poor and Irish.
I notice there's this subtle lightness of color around all of the black lines, giving the image a "sharp" look. I actually see it in a lot of images...is it deliberate effect, or a result of JPG, in your image? I am trying to do the same thing. ;A;
I also appreciate that you draw them very on-model and keep with the physical structures and not kawaii ugu