Hi Eightball -
Good for you for asking!
Most quality reenactors go with "been there, done that" decorations, with a few minor exceptions.
The exceptions include a CIB for an infantry impression, CMB for a combat medic impression, jump wings for an airborne impression, and wings for a AAF impression. Those badges were all very important to the people who really earned them, but you wouldn't see a combat infantryman without a CIB, a combat medic without a CMB (depends on the time period), a paratrooper without jump wings, or a pilot or aircrew member without wings.
I see a couple of problems with your list:
The Soldiers Medal is a valor award, and a pretty rare one. It is awarded for actions at the risk of one's life, while not in combat. I have seen It described as a "non-combat Silver Star." I don't know if that is accurate, but you get the idea.
The Good Conduct Medal is for enlisted men only. Officers do not wear the GCM unless they earned it during prior service as an enlisted man.
If you are doing an impression of a pilot based in England or anywhere in Europe, then you would rate a Europe, Africa, Middle East campaign medal commonly referred to as an EAME. Everybody got those, pretty much by just by setting foot on foreign soil. If you have narrowed your impression down to a specific unit at a specific point in time, you could do some research and see if that unit had been awarded any campaign stars by that time and add those to your EAME ribbon.
I hope this helps!
Edited by Steve B., 30 October 2019 - 02:32 PM.