I know George RR Martin has given us plenty of surprises. He has killed off his main cast, his characters are complex with shades of grey and he has blurred the lines within his character archetypes, but in the end, I think it will end up being the classic heroes journey: ORPHAN-WANDERER-WARRIOR-MARTYR
John Snow is the protagonist and starts out literally an orphan, a bastard child. Then his journey of self discovery at (and beyond) the wall. Now he has become the hero, the King of the North, the prince that was promised. In the end, he will no doubt martyr himself for the good of the people. Classic heroes journey and I love it.