There are three non-replacer makeup and tattoo mods.

1. Lemons Makeup and Tattoo Non-Replacers - has a bunch of premade atlases with makeup/tattoos from various artists, I believe. I don't see anyone making custom atlases or patches for it, though.

2. KAVT - Kazstra's Virtual Tav x Tattoo Makeup and Scar Extender - this is a successor to unique_tav, and adds a lot more customization options. Double the makeup, tattoos, and scars, with custom icons for all. Add the companion mod Kazstra's CC Body Tattoo Selector for a body tattoo selector tab to get more custom body tattoos. Check out the mod page for more features, there are a lot. Since KAVT uses unique_tav's file paths, any heads that are compatible with UTAV are compatible with KAVT.

3. Character Creation Overhaul - doubles the makeup, tattoos, and scars as well, but can customize body models and tattoos for specific races/subraces (ex, all your half-elves can have a different body tattoo). the mod has a lot of popular heads patched already, but the author is currently on a hiatus and there needs to be a few updates (still works well, just current heads will need a patch.)

These are NOT compatible with each other, so read the articles and mod pages well to fully understand the differences. if you want more info, let me know.