If only a cockerel she'd bully him too and possibly injure until he was larger. A cock bird (over year old) would put her in her place right away and without injury to the hen. Attitude is vastly individual dependent not by breed. I'm sure you can find a proven non people aggressive cock that is kind to his ladies. Finds food for them, alert system for predators, protector and general proctor of hens. Cockerels from this spring are yet to be proven and can turn on people quick. A young bird getting his licks from hens, not pullets, before taking control of a flock are said to have better chance of being well behaved.
There is a glut of cockerels this time of year but if you look hard enough you can find someone who is ready to rotate out their cock bird for a new breeder or just downsizing flock due to onset of winter. Craigslist is a good place to start looking.