I agree, looks like a Cooper's. Gos have coarser streaking below that typically extends all the way to the undertail coverts. The uneven tail bands don't really work too well from below -- the outer pair of tail feathers don't seem to follow the same pattern as the rest. The white patches you see are on the scapulars, and Coops and Sharpies both frequently show white patches there at this age. On Gos, you want to look for pale buff spots on the wing coverts, below those scapulars.