Are you playing on a laptop of desktop? If a laptop, it could be thermal throttling (maybe even with a desktop). It does not appear that you have any scrap mods have you used console commands to delete items.
I could not see anything in your mod list to suggest a direct conflict, but you should use xEdit to look for conflicts.
What mod manager do you use? This is the framework I use now with respect to load orders:
Master Files
Right after Master files Unofficial Patch and Armor keywords
Fast Starts and Frameworks
Faction and AI Overhauls
New Landmasses
New Factions
Vanilla Quests Modifications
Settlement and Workshop Menu Items (Vanilla Menus)
Settlement and Workshop Menu Items (Scripted) SMM and and mods that require SMM
Settlement and Workshop Menu Overhauls (like Workshop rearranged)
Game-Play Changes and Tweaks
New Companions
NPC and Companion Changes
Radio and Audio Mods
Visual, Texture, Atmospheric Improvements
Lighting and Water Changes
Vanilla Settlement Changes and Tweaks
Sorting Mods
HUD and DEF_UI Mods
Pip bob Map Mods
Character Model Replacers, Enhances
New Weapons, Armor, Clothing (non-craftable)
Craft Your Own
New Settlements, World Edits
Player homes
New Settlements
Single cell edits
Interiors that do not disable precombines.
New Quests
Weapon and Armor Modifications
New barrels
New weapon and footstep sounds
Any patches to the above weapons and armors;
Scrapping, World Edits, Landscape and Terrain
Frameworks and other bottom mods
I would change out Boston FPS as that is quite old. A new mod, https://www.nexusmod...46403?tab=files
should help somewhat.
I determined that my constant stuttering was caused primarily by Thermal Throttling. I was able to drop the temp of my CPU significantly using Throttle Stop, but my GPU card has not been cooperative. As the weather has now cooled, no stuttering.
I hope this helps a bit. There are a myriad of things that could be causing what you have described.