Unfortunately, I don't know of an article off the top of my head that could detail this better, but...
Chell from Portal 1 is by no means a damsel in distress, nor an overly sexualized female character made with the intentions of providing eye candy. (Though, with Portal 2 she had an overhaul that made her fall back into that stereotype.) I'm not going to lie - I do appreciate pretty female characters as main characters, but I felt like such a point if expanded upon could be pretty solid; the fact that most females represented in games are attractive or sexualized. Without a doubt, the same goes for males, but not entirely. They are backed up with characters like Mario (who could forget 'im?) and a small handful of others.
Everything else posted thus far sounds good to me, too!
(Edited to fix a link.)