Re The Mysterious Stranger
I have actually been trying some things out along these lines. Not exactly what you asked for but, like some of the other things you have asked for, similar enough that I'm starting to suspect that maybe you were the one who hacked into my computer through my wifes' Facebook page two months ago.* I did have a script that spawned new creatures and NPCs at spawn points without touching the spawn lists. (mentioned in another of your posts) This had the advantage of being controlled by a script, so NPC and Creatures could both spawn at the same place, but had the big downside of being incompatible with MMM Increased Spawns. (I made my own version of increased spawns, but I didn't feel like remaking all those compatability patches) I have since revisited and tweaked the script a bit. Some of the ideas that I had were:
- Multiple levels to the Animal Friends perk that, at higher levels, caused animal friends to spawn and fight for you when in combat.
- NPC Reinforcments. After begining combat a timer/counter would start and after so many minutes/kills more NPCs would have a chance of spawning in areas you thought were cleared and safe.
- The3rdType has asked for a Doppleganger mod. This would create your karmic opposite who tries to hunt you down.
So making a non VATS stranger visit should technically be possible. Though there are many questions, like how to handle him after combat, would need to be addressed. If any modder wants to try this or any other of these ideas, they are possible just a lot of work, have at it.
*Disclaimer: The statements made in this post were meant to be taken in a facetious manner. At no time was any member of the Bethesda board suspected of taking part in illeagal activites.