From the description of True Directional Movement - Modernized Third Person Gameplay:

...By default, I've added 'Boss' LocRefType. In vanilla, it's used to mark boss enemies at the end of a dungeon. Mods like Vigilant seem to add
most (if not all) bosses correctly as the Boss LocRefType so they should be automatically supported. However, Bethesda also have marked NPCs like vendors as bosses of their homes, so a boss bar will appear when you attack them. This might not be desirable, which is why I added a blacklist. I did not fill it up, however, besides adding one merchant as an example.

I went through all of the game and DLC's locations and added everyone else who shouldn't be a boss. It sucked, and I don't want to see a Skyrim Location data set again for a very long time. But here you go, now you don't have to fight boss-tier Heimskr if he catches you robbing his house.

Should also work with TrueHUD - HUD Additions going off what descriptions say, but I haven't tested it. 

A big thank you to Ershin for pointers on separating the ini files!

Compatibility:
It's just an additional .ini that adds to the one in True Directional Movement. Can't really break anything on its own, I think.

FAQ:
Q: I see a boss health bar on a non-boss! What do?
A: If you spot a non-boss with a boss healthbar, post it in the comments and I'll add it to the blacklist. There are alot of NPCs I had to add, I'm sure I must have missed a couple somewhere. Orc Chiefs, Ulfric, and Tullius are supposed to have them, so don't worry if you see that.

Q: Why is this enabled for donation points?
A: Because I fucking deserve something for the soul-killing 4 hours it took to make this by hand.

My other True Directional Movement Patches
True Directional Movement - Gray Cowl of Nocturnal Boss Ini Tweaks Whitelists bosses and blacklists citizens added in Gray Cowl of Nocturnal
True Directional Movement - Moonpath to Elsweyr SSE Boss Ini Tweaks Whitelists bosses added in Moonpath to Elsweyr
True Directional Movement - Legacy of the Dragonborn SSE Boss Ini Tweaks Whitelists bosses and blacklists citizens added in Legacy of the Dragonborn SSE



My other Mods
If you like this one, perhaps check out:
Thalmor Use Elven The Thalmor use elven weapons at minimum.
Jenassa in Chitin or Jenassa in Chitin - SPID To give our mercenary armor that suits her.
Irileth in Chitin puts Irileth in chitin armor.
Aranea of the Temple or Aranea of the Temple - SPID Dunmer priestess wears the robes of the dunmer priesthood.
Aela in Wolven puts Aela in the wolven armor of the Companions' Circle.
Dunmeri Ghosts - Dunmeri Gear To make sure Barenziah's Crown was escorted by true dunmeri warriors.
Civil War F Off - No Season Unending Makes the Civil War, um, "fly" off.
Elementalist's Fletching If you'd like some elemental arrows in your life.
The Jarl's Household Guards To give the Jarl's personal guards a more unique feel.
Imperial Honor Guard Gives Tullius some proper protection.
Waymark - A Road Signs Mod Adds more signposts and road signs to Skyrim.
The Redoran Council Guard Gives the Councilor of Raven Rock's personal guards a more unique feel.
Climate-Aware Stormcloaks Reintroduces the cut sleeved Stormcloak Cuirass by giving it to Stormcloaks in cold locations.
Necromancy is Taboo Upstanding members of society no longer sell spells from the reviled and feared school of Necromancy.
Stones of the Stars A Morrowind and Oblivion inspired Standing Stones overhaul.
Children of Nirn A Morrowind and Oblivion inspired Race overhaul.
Jailors and Turnkeys Differentiates the jail guards from the generic guards.
Civil War Officer Corps Adds Stormcloak and Imperial Officers to lead patrols.
Gold is Septim and Has Weight Gold is Septim and has a weight based on historical currency like a big nerd.
Faction Specific Loot - Eagles of Alinor Handcrafted overhaul of Thalmor item pools.
Faction Specific Loot - Children of the All-Maker Handcrafted overhaul of Skaal item pools.
More Dangerous Enemy Poisons Enemy poisons last longer and are more dangerous.
Fletching - Craft Arrows Anywhere New power to craft arrows wherever you please.
College Ghosts - College Robes The College Ghosts in Labyrinthian now wear College robes.
Faction Specific Loot - Blades of Mephala Handcrafted overhaul of Morag Tong item pools.