There are some enemy groups with NPC-looking people in them that will fade at enemy group distance vs citizen distance...still not as far away as player model distance but somewhat further. I can't think of the group names off the top of my head, though. But like, the "citizens" in TPN, for instance.
The Crazed work well for that. Listing them all here but only looked at a few.
MaleNPC_Villain_01
01 thru 05, 50 thru 54, 100 thru 115, 200 thru 203, 210 thru 213, 220 thru 223, 240, 241
FemaleNPC_Villain_01
01 thru 05, 51 thru 55, 101 thru 115, 200, 201, 220 thru 222