My Ogre crusader (now pally) used 2H mauls from the moment he could, until now. I haven't looked back since. I'm frequently (in fact, primarily) the main tank in groups I join, and I never swap out to a sword and shield.
I'm sure I could, and for all I know that extra .0000012% of tanking ability added might help :) But so far I've had absolutely no complaints from anyone concerned, and I sure do enjoy swinging that biga$$ hammer :)
Until recently he was using the Maul you get as a quest reward in the Willow Wood (can't remember the quest, though). I think the maul was actually called the Willow Wood Maul or something like that. Served him well.