I was looking through The Night Below for information on Juiblex, I remembered that The Blood Queen and Ilxendren were included in Monster Mythology format, so I’m thinking I’ll add them to my project.
Other possible additions I could make, although none have:
Krocaa (aarakocra, Dragon #124)
Anguileusis (anguilians, Sea of Blood)
Klikral (insectare, Spelljammer)
Dakarnok (kobold, Dragon #63)
Tapann (korred, can’t recall the dragon mag number)
Refnara (gnoll, Dungeon #48 IIRC)
There’s also the Neogi pantheon, the expanded Dragon pantheon, the archomental cults, and the centaur pantheon, but I think I may save them for individual blocks.