I'd like to see a spear and shield tank. Call it Hoplite or Valkyrie. The skill that could set it apart from other tanks could be a monster pull skill, call it Harpoon, and it pulls a trash monster straight to the tank.

Or

Beastmaster, axe and shield. Make it's lore that "good" Beastmasters protects the party from monsters by controlling them. Then it doesn't have to be a limited job nor have to worry about having actual pets.