Edit: I'm going to make a prediction, I foresee minion-based builds featuring things like Battle Artificer, greater steed paladin/spell-stealing bard, summon druid/necromancer or, ironically, beastmaster ranger.
Well, I'll be surprised if a (main) moon druid (build) with appropriate skill picks (and with a little more emphasis on mental stats than I'd usually expect) doesn't win this.