Hmm...
Arcanine has little going for him aside from being one of the bulkiest fire types possible (lol), so maybe some UU testing for him. Claydol is a nice spinner, but I don't see him sweeping nor walling entire UU teams. He'll be bulky of course. Drapion seems interesting as a UU wall also, certainly stoppable with the earthquake disadvantage, but nice resists and stats may be too much...
Houndoom is a glass cannon, weaker than Weavile in both defenses, and only 110 Sp. Atk to cover himself. But he seems too strong for UU, but I'd be willing to test him if anyone else is.
Ninjask can be phazed, and I don't see him sweeping teams. Roar Walrein pwns him already, and probably Noctowl / any whirlwinder as well. Stealth rocks hurt him a lot this generation, so I'd be willing to test.
I'm also willing to test Shedinja, simply because stealth rocks / spikes kills it completely.
Heh, some of the guys I'm looking at seem a bit powerful >_>