I guess that I'm the only one that'd like to see a class like the Rifleman.
I guess it comes to play style preference. I love TF2's personality, but I can't play the game. I can never find a class that I like. I think it comes down to being too used to the adaptable play-style that you get in Halo and other shooters, so the class based system of TF2 doesn't work for me.
Back to the artwork, I think he fits in well with the art style, although he looks more French than English to me.