On some NPCs (and sometimes when you randomly generate a head) the heads are pink, but not a solid pink, a whole bunch of shades and they're bright and glow. I tried using BOSS, but to no avail.

Here are my mods:

Oblivion.esmOpen Cities Resources.esmTNR ALL RACES FINAL.esp TNR - ShiveringIsles no helms.espDLCShiveringIsles.espAdvanced_Water_Modification-2734.esp300_Lore_Dialogue_Updated.espAdonnays Ranger Coats.espClocksOfCyrodiil.espClocksOfCyrodiil_BC_OBC_OC_OCLR_Vanilla.espkuerteeSittableRocks.espCane of Sheogorath.espCrossbows of Cyrodiil.espcyrodiil transportation network 1.3.espcyrodiil transportation network 1.3 wz.espOC+CTN Patch.esp300_Regal_Imperial_City.espHeroes of Cyrodiil.espHeroes of Cyrodiil Part 2.espHeroes of Cyrodiil Part 3.espHeroes of Cyrodiil Part 4.espHeroes of Cyrodiil Part 5.espJQ-AssassinQuest.espJQ-AssassinQuest-NoMarkers.espKDQ - Rural Line Additions.espRegion Revive - Lake Rumare.espKnights.espxuldarkforest.espxulStendarrValley.espxulTheHeath.espXulEntiusGorge.espxulFallenLeafEverglade.espxulColovianHighlands_EV.espxulChorrolHinterland.espxulBeachesOfCyrodiilLostCoast.espxulbravilbarrowfields.espxulLushWoodlands.espxulAncientYews.espxulAncientRedwoods.espxulCloudtopMountains.espxulArriusCreek.espxulPatch_AY_AC.espxulRollingHills_EV.espxulPantherRiver.espxulRiverEthe.espxulBrenaRiverRavine.esp  xulImperialIsle.espxulBlackwoodForest.espxulCheydinhalFalls.espOpen Cities New Sheoth.espOpen Cities Anvil.espOpen Cities Bravil.espOpen Cities Bruma.espOpen Cities Cheydinhal.espOpen Cities Chorrol.espOpen Cities Leyawiin.espOpen Cities Skingrad.espOpen Cities Outer Districts.espOpen Cities Full.espAlternate Start Revamped.espMadgod Powers.espRenGuardOverhaul.espRenGuardOverhaulShiveringIsles.espEnhanced Grabbing.espactors_in_charge.espActorsInMadness.espAltair_Race.esp Open Cities Road Record.espEnhanced Economy.espsheogorath race v2.2 Beta.espReallyImmersiveMessagesDebug.espReallyImmersiveMessages.espwalklikesheo.espReallyImmersiveMessagesNoBirthsigns.espImperial City Suburbs.espReally Open Cities Full + Leyawiin Reborn.espAssassins Creed - Altair's Gear - Light Armor.espAssassins Creed - Altair's Gear - Heavy Armor.espPistols!.espYou are The Gray Fox.espNazgulSword.espBHC_Expanded.espBetterVampiresG1.15.espBetterVampiresE1.15.esp

I would say that this is most likely caused by missing/mismatched textures. Did you install all of your mods through a mod manager?

Not all of them, only the ones that came as an omod.

Well, what I would do then is uninstall everything and reinstall it all, this time making OMODs of everything. When OBMM tells you that there are file conflicts between multiple mods, study the "view data conflicts" screen. That's what I always do, and I've never had a texture problem.