OK, in an effort to track down the cause of the RARE kill happy Sentry problem and to just generally answer the question of what's compatible, I'm making a list here.  It's going to be alphabetical by mod name. 

Skyrim DLC, Unofficial Patches, SKSE and SkyUI go without saying as being compatible
Clothing, Weapon and Armor mods will likewise be assumed harmless unless they have some sort of script

The list is going to be pretty extensive as I flesh it out, but that's because a good 1/4 of the time, a mod conflict will be caused by something that seems totally unrelated to the area where the trouble is caused.


Alternate Start; Live Another Life - No conflicts but the join Harkon's faction option is broken
A Matter of Time - Works Fine
Apocalypse Magic of Skyrim - Fully Compatible
A Quality Worls Map - Fully Compatible
Arissa the Wandering Rogue - No Known Issues
Arrows and Bolts Tweaks - Fully Compatible
The Astoria; Dwemner Airship - Compatible

Bag of Holding - Fully compatible
Bag of Trash - Fully Compatible
Bathing in Skyrim - No issues during last play through
Better Sorting - Compatible
Better Vampires - Up through 6.8 is confirmed good, new 6.9 is uncertain
Better Vampire Lord Transformation - Compatible over long periods
Brawl Bugs FIx - Fully Compatible
Breezehome Fully Upgradable - Compatible
BTRH Waifu - No issues, I've used it for a long time

Civil War Cleanup - Fully Compatible
Civil War Overhaul - No known issues
Climates of Tamriel - No Known Issues
Craftable Lockpicks - Compatible
Cutting Room Floor - Compatible

Dual Sheathe Redux - Worked fine in my last, brief play thru

Expanded Cities and Towns - Reported Compatible by 3rd Party after hours of cheking

Faction: Pit Fighter & Pit Fighter Travels - Compatible
Fairies of SKyrim - Compatible
Falskaar - No Known Issues
FISS - No issues
FNIS & It's Add-ons - No Known Issues
FUZ RO D-OH - Compatible & Highly Recommended

Hearthfire Multiple Adoptions - Compatible
Holidays - No Known Issues
Huntsman Bow (by InsanitySorrow) - No Known Issues

Item Recycling - Compatible

JContainers - No Issues
JK's Whiterun - Recently made compatible
The Rest of JKs City Overhauls - Reported no issues by third party
Join the Dawnguard as a Vampire - No issues during 15 minute test
Journal for the Absentminded Dovahkin & its USPK Patch - Work Great

Lilarcor (by InsanitySorrow) - No Known Issues, but I never did find any pieces of the sword
Lustmord Vampire Armor - Fully Compatible

Magicka Sabers - Compatible
Marriable Serana & Its Hearthfires Expansion - Work Fine

Naruto Ultimate Overhaul - 10 minute gameplay test, seems compatible

Portable Hole - Fully Compatible
Princess Riverwood Cottage - Compatible
Pure Water - Worked fine on last play through
Pure Weather - No Known issues, used for a few hours on my last play thru

RaceMenu - No issues with it or several of it's plug-ins
Run For Your Lives - Compatible and Helpful - Recommended

Save Game Script Cleaner - Utility, so no compatibility issues, Recommended
Shorstone Castle - No Known Issues

Tailoring (only on Steam)- Fully Compatible
The Eyes of Beauty - Fully Compatible

Vilja & Vilja in Solstheim - Fully COmpatible

Wet and Cold, W&C Ashes and W&C Holidays - Fully compatible
Wearable Lanterns - Fully Compatible
When Vampires Attack - Compatible & helpful - Recommended
Wyrmstooth - Fully Compatible

XPMS Skeleton and Groovtama's XPMSE Expanded Skeletons - Both Good