Blastoise could be considered a pseudo tank, as it has tankish defenses but only has Rest as a recovery move. So sort of like a UU tank, where things won't be hitting as hard, I suppose.
				
			Wow, I am suprised noone aid Rhyperior. He can take most hits and can deal great amount of damage.
Tyranitar is one of the most favorable and noticable Pokemon to be considered a tank.
I always believed a Tank was different from a Wall in that Tanks are just Walls that can do damage.
I'm still deciding whether to use the good ol' SkarmBliss combo or use Cresselia over Blissey for once.
Bronzong would be the best tank around with a non-Rest form of recovery.
Really? ... I don't see any non-rest recov moves for Bronzong.
@Yoshi King
Bronzong is great even without Recover. Note that both he and Dusknoir, excellent typing and EVs for Walls (and let's not forget Bronzong's abilities), have no true "Recover" technique (Dusknoir gets Pain Split, which is circumstantially good).