Doublade
It held down a significant number of top tier threats including Virizion, Cobalion, Durant, Tyrantrum, and Reuniclus, which only began to excel once it moved up to UU. Doublade was also the face of offense from Shuckle meta up until the time it moved up. It also proved to excel even on stallish archetypes due its outstanding defensive characteristics and ability to act as a win condition. It was a perfect Pokemon in pretty much everything it wanted to accomplish; the only thing keeping it above Moltres was the fact that its checks were actually good.