Outkast are by far the best group out of the whole Dungeon fam circle, and i love they music as much as the next man, especially their earlier works, SouthernCadillacMusic and all that, but i say Native Tounges overall made a bigger impact and made doper music. Even when they did that hip-house shit (check out the first vid), it was fresh.
Plus, although Native Tongues was primarily, ATCQ, JB and DE LA, they had other affiliates repping the name like Black Sheep, Mos Def, Bush Babees,etc,etc, so overall i go for Native Tongues.
Here are some Native Tongues cla**ic.