The Stall
Foxmouth
Lets make it clear and succinct.
To prevent yaw will in it self prevent the stall becoming a spin. (you must be yawing to be spinning). Following the initial 'wing drop' the correct use of rudder will be to prevent yaw or any further yaw which gives to the secondary effect of roll / slip, further yaw and further roll/slip/yaw and so on. You are not controlling roll with rudder but rather preventing the cause of it.
FFF
I'm sure it is a slip of the tongue. The four forces; pitch down = Lift and Weight. Thrust and Drag = pitch up. Therefore the pitch down moment of the tail plane is primarily balanced by Lift and Weight. Weight becomes dominent at the stall causing a safe pitch down movement.