here are some of the things i've seen
question have you tried using loading NPC's without giving them armor or weapons ? the NPC in the two pictures above the red one was put into the game by mistake without being given armor or weapons...i just wiped my NPC folder and redid each NPC giving them armor and they seem to be fixed this is the same large NPC and my player charcter now with the NPC given armor and a weapon and no the NPC is not an edited file just max height and some other high sliders