Fast Learner said:There are all kinds of classes and rules that have great potential, imo.
Yes. You certainly have examples of cleric (the septons, the followers of the fire god); fighter (too many to name); barbarian (the Dothraki; the wildlings); wizards (blue-lipped Quarthi mages; maybe the maesters; the pyromancers that served the Targayens); rangers (the nightwatch); rogues (too many to name but start with Tyrion); assassins (Sorrowful Ones; maybe some Unsullied); and druids (priests of the Old Gods; wargs).
Is there any class that can't be accounted for?
I would see the primary difference being that most characters would not have access to magic. Being a spell caster would require specific membership in the few organizations that had a knowledge of magic.