Ceros could kill half the Akatsuki right off the bat. Only problems are Pain's Shinra Tensei and Chibaku Tensei, both he can do while most Espada are bragging about how powerful they are. Itachi sealing sword could also take out any of them. However in the end Ulquiorra and Stark should give the Espada the win, Barragan is just to overconfident to fight them seriously.
On a side note i'm not convinced Barragan could survive a Bijuu Dama from the Juubi.