Or you create corridors? Most 10 wide have a 3-4-3 already and if you have more horizontal space 3-3-3-3 might be an option with the same amount of middle seats

Or you create corridors? Most 10 wide have a 3-4-3 already and if you have more horizontal space 3-3-3-3 might be an option with the same amount of middle seats and two extra seats.