I’ve always had a soft spot for Humakti. Sacred killers, they live outside of normal Orlanthi society but nonetheless have an important role within it. With their code of honor, strange taboos and powerful gifts, and their one-shot approach to life, they make great player characters.
Some of my own favorite inspirations for Humakti characters are Blue Eyed Samurai, Kenpachi Zaraki from Bleach, William Munny from the Unforgiven, and Angel Eyes (for your more villainous characters). Some of them protect women and children, some of them have killed innocents (and pretty much everything that walks or crawls). But they all have their code of honor, even if it can be pretty idiosyncratic.