So even the aileron on the dropping wing may well be able to impart some useful roll-moment and reduce the amount of wing-drop
If the dropping wing is stalled and you are adding aileron to pick it up you are asking (depending on type) for something it may not give, in fact depending on type you may get exactly the reverse of what you want - the stall on that wing gets deeper and the wing drops more and the yaw increases.
In fact doing that is a great way to make a number of aeroplanes drop into a spin quite nicely. The stalled wing is being sent into a higher AoA and so stalls deeper and yaws and rolls more (one potential one, under the right conditions is the DHC-1 Chipmunk you have experience with BTW)
Some aeroplanes are more pilot proof than others and are designed to allow a pilot to mush their way with ailerons in a stall without biting. Some don't.
I think it is important to encourage a reaction of pilots in stalls not to use aileron (unless they do so deliberately and consciously and with a knowledge of the consequences for the aircraft they are flying).
I would pick up a pilot who tried using aileron in a stall to stop the roll.