Any of the tank classes would be most appropriate. These are Black Orc, Swordmaster, Chosen, Knight of the Blazing Sun, Ironbreaker, and Black Guard.
I've only played the first two myself to Tier 2 but I highly recommend them. They mirror each other in that they use the same mechanic: Stances. Only some of your abilities are useable based on which stance you are in, essentially meaning that you fight with katas or forms like Eastern martial arts.