Really nice comparison!
My favorites are the Taiwan Starburst and BP She-Ras.
I have the fat head She-ra with your first question mark. She has "Mattel Inc. 1984" stamped on her back and the back of her head says: "(copyright symbol) M. I. 1984." I don't see a country of origin mark on her.
I hope that helps! I will look through my others to see if there are any marks that might help identification.