The class you describe is called Paladin or Warlock.
So can mage vs anything non aggro. I need on average less time with my Priest than with my Warlock.
Aggro and control takes a different kind of skills and aren’t really comparable, though the longer the game the more likely it is to screw up. Games that last 20 turns can indeed decisvely be settled by one mistake in the lategame. A Murloc Paladins life is rather chill^^ (It’s quickly over and doesn’t take much mental energy and you become less tilted compared to playing a 20 mins game and you lose)