33. Barristan Selmy
He lay wounded while his king died. Then he was forced to stand aside as his new king got killed by a boar. Then he was forced into early retirement by that same king's son. Barristan the Bold has a spotty track record as a member of the Kingsguard. But as a Queensguard for Daenerys Targaryen, Mother of Dragons, the old man may have some life left in him yet.