Here are a few good Hazers.
Blastoise/Tentacruel/vaporeon/Milotic-Bulky waters have the defenses to take hits while using this.
Gengar-His high speed allows him to get in a quick haze before the enemy can strike. A focus item might be good for any of these guys if they boost up attack stats too high.
weezing-Gets levitate to dodge any upcoming earthquakes
Dragonite-A versatile pokemon whom many people would not expect to carry haze. Not good for dragon dancers.
Politoed-Though he's just used for weather, you might use this with him.
Quagsire-One of the new UU bad boys; great for him.
Muk/Altaria/Confragius-support walls can deal with it quite well.
According to serebii the complete list is Blastoise, Arbok, Poliwrath, tentacruel, Dodrio, Muk, Gengar, Kingler, Weezing, seaking, Vaporeon, Omastar, Dragonite, Crobat, Xatu, Politoed, Quagsire, Qwilfish, Octillery, Masquerain, Altaria, Seviper, Milotic, Drifblim, Honchkrow, skuntank, Darkrai, Confragrius, Gabadoor, Chandelure, and cryogonal.
