Ralif Redhammer
Legend
For Out of The Abyss, I could easily see using some of the locations in it as stand-alone resources for adventure (Gracklstugh would make for a very interesting base city, outside of the threat of the demonlords).
Tomb of Annihilation- one of the very best long form 5E adventures. Loads of good large and small dungeons and single-session set piece site-based adventures. Great bestiary. Great encounter tables. Great maps. Also works as a setting book for Chult.
Netherdeep- there’s a tier 2 dungeon as kind of the climax of act 1 (Baxoxan? I don’t have it in front of me) that’s a p good stand-alone dungeon and the town around it is also good.