It's probably exceedingly difficult to be able to read all stuff in a game. In fact the game is designed to be overstuffed so that you will miss things.
You'll probably want Fane because he has the Scholar and Mystic tags, which are useful for solving quests. The "Barbarian" tag doesn't do much. Corpse Eater is elf-exclusive... but Fane can eventually get a shape-changing item which I think can let him assume the shape of an elf and eat corpses.
Persuasion goes on your lead character.
Wits goes on one person - probably a Ranger or 2H weapon fighter (Wits is NOT optimal for a Rogue), and the Peace of Mind skill is very good because it buffs Wits.
