Yeah, Joe Hart would probably have the top 10 all to himself
He's not been at his best, but most clean sheets and least goals conceded tells me he's doing far better than you reckon. Kompany has been injured for a large part of the season, so we've had to use the inexperienced (and phenomenal) Nastasic and ageing (and possibly drug-addled) Kolo Toure at centre back.
EDIT: Oh, and Javi Garcia would get the top 10 to himself. That boy scares me.