Looking for a Modpack with Questline, Boss progression, some type of narrative and NPCs

I want a modpack I can play SOLO. Something addicting that I can put hours in but won't make me feel lonely or at a loss of what to do. I'd like something where the mods are integrated together and don't feel like they are just there to add fluff. I want to be invested in this world, so I ask for a modpack that has some sort of story (even if it's small). Most importantly, I want boss progression. Making sure I cannot continue to progress the world until I've completed a challenging battle (not just a boss I see randomly spawn or only to get into a cave). There must be some kind of end goal to this pack. And obviously, I'd like it to be fun and not completely unbalanced.

https://redd.it/1myc01k
@MinecraftModded

Reclamation modpack, can't for the life of me figure out how to make a wildfire core [Embers Rekindled] helppp😭
https://redd.it/1mygwnf
@MinecraftModded

Went to the nether in a world with Create and Biomes O Plenty installed. Imagine my rollercoaster of emotions when I got excited, thinking I wouldn't have to farm redstone anymore, then the disappointment it's from BoP... This is the definition of "Water in every direction, but not a drop to drink"
https://redd.it/1myhxsw
@MinecraftModded

I just released the biggest update for my mod, LTX Industries (formerly known as LimaTech). New machines, items, fluids, and a visual overhaul for lots of things!

https://redd.it/1myjav7
@MinecraftModded

Don't let the intrusive thoughts win...

https://redd.it/1mym8mr
@MinecraftModded

Guess what I am making!
https://redd.it/1myov7x
@MinecraftModded

I don't play Minecraft
https://redd.it/1mypxkk
@MinecraftModded

What mod do that
https://redd.it/1mys1y5
@MinecraftModded

Moving with supplementaries be like:
https://redd.it/1myty3o
@MinecraftModded

[Modded Minecraft Wiki] Content aware update

https://redd.it/1myuhzp
@MinecraftModded