Agree with Ash's face. I think the lips for him are too red, and his eyebrows look kind of strange, I don't think it fits his face.
I like Tony's face, like the cut on his nose. Also his lips and his overall expression fits his personality in the game.
Overall, they are all pretty good. Maybe Ash needs some work, but I think the personalities that they have, all match with the faces they have. Also, I think Mark looks good with all the hair he has, kind of matches the mask he wears because bears have a lot of fur.
Also you forgot about Jake, who I think looks great for who he is. The Confederate flag in his room, his personality, and how he gets angry fast with the phone call.