Well, Lexie would not be a bad choice, they'd make a more sane couple than any other women he's been with so far. But the whole Gizziegate....... I hated it and maybe that is why I want George to learn from his mistakes first before having a relationship with another Grey sister.
I think it was interesting how Alex first tried to kiss Izzie and then broke down, all season we have seen the chance of him changing and in the end, he seems to have the hard way, even admitting things about his past. So he's not a bad guy and in the long run he'd be good for Izzie. Mind you I said long run. Not first episode in the coming season. Finale maybe?
And Mark...... we'll see. He's one of the few left unkissed so...........new leaf after all?