The ailerons should be neutral until control is regained, then level the wings.
I believe most training aircraft designed in the past 25 years or more are designed so that the ailerons are effective beyond the stall. That being so, while you are correct in saying sufficient rudder should be applied to prevent further yaw induced by the down going wing, the recovery with forward stick to reduce the angle of attack is instantaneous allowing the ailerons to be used to level the wings. There is no case for keeping the ailerons neutral during the initial prevention of further yaw because recovery is instantaneous with the ailerons effective
by design below the stall.