One more suggestion, in case this wasn't on your radar yet:
Interesting NPCs - 3DNPC - Overhaul
While I love Interesting NPCs, the vanilla-ish look of the new NPCs can be quite glaring in a pack that has a lot of beautification mods (bijin, men of winter,...) installed.
It's one of these once-noticed-you can't-unsee-it things for me.
This mod overhauls the looks of quite a few interesting NPCs to better fit the improved looks of vanilla NPCs.
I was able to add this to my "NPC retextured merged.esp" without issues.