A little while ago, I was thinking of making a Rhienland character, but in the end didn't because I don't overly like the roleplay in Rhienland (On either side of the law) and I was thinking of using the Medic from TF2 as the pic for him if/when I made any transmission stuff or signatures for him. However, seeing as I'm no longer going to make that character, my suggestion to you, for your guy's character, is to use the Medic from Team Fortress 2. It's not RL, or anime, and I know you said artwork, but meh, he sorta fits the bill...
Here's a couple of images specifically of the face, I guess they could work:
(OK< This is a drawing of him, but it could still work...)
Meh, OK, maybe not, but was worth suggesting I guess...