I vote Javik or Legion myself. As for this pic, I'm impressed. I can just see this person doing a 'Krogan Air drop' That said, I'd actually like to see him with EVE, especially if it involves him either with their children, or Eve proving she can protect herself. (or both)
Wicked human Wrex there. If you ask me, though, this Wrex looks more like if he were younger than presented in the games. Still totally badass. Other than the ones you already did, how would you humanize the rest of the alien crew of Mass Effect? By that, I mean what they'd look like. To me, Grunt would look like an oversized baby, Javik could possibility be ancient African looking, Garrus could be one handsome devil (even if scarred horribly), etc.