Stall Recovery
Rudder to prevent FURTHER yaw! That is, should a yawing moment be active.
Never forget that Rudder is effective around the Normal axis (Yaw), Aileron is effective around the Longitudinal axis (roll). That is what they are bolted on to do!
In a modern aircraft that is properly loaded the Tail Plane (elevator) WILL BE efective at the point that the Main Plane stalls. Slipstream will increase the effect of the elevator and rudder (Tail Plane & Fin) and therefore the addition of power will shorten the recovery time and therefore minimise any height loss.
Elevator and power are applied simultaneously (that is at the same time, sic.). Rudder is also applied to prevent any yaw that may result from the change in power (slipstream)
Why get any more complicated than that?