Rainer
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I'll vote for the Overlord.
After all, the others are either weaker than him – for example, Tieru; or newcomers – for example, Zephyr, a very young mage, albeit talented; Faydaen – an impulsive and inexperienced warrior (a poet and diplomat :D); or rulers of states, or guardians of various cults and laws, or mages and wizards who have reached a certain level of mastery.