Which leaves us with...
Archomentals (Good) (Ben-Hadar, Chan, Sunnis, Zaaman Rul)
And from the first edition Deities and Demigods, as well as the second edition Legends and Lore, there are a number of beings that are not quite gods but very powerful all the same. These include:
Air Maidens (Finnish – Ukko’s warriors)
Antaeus (Greek giant)
Dahak (Babylonian three-headed dragon spirit of death)
Enceladus (Greek giant)
Fenris Wolf (Norse)
Garm (Norse guardian of Hel-gate)
Legends and Lore additions:
American Indian monsters (Big Head, Gahonga, Ohdowa)
Chinese monsters (Neglected Spirit, Ancestral; Generals of the Animal Spirits)
Greek monsters (Gigantes - Antaeus & Enceladus)
Japanese monsters (Tanuki)
Norse (Fafnir)
Dancing Hut of Baba Yaga - Baba Yaga
Plus, there are some monsters lurking in the other conversion thread queues that are better suited for this thread:
From D&D Immortals Set:
Draeden
Dragon Rulers
Elemasters
Megaliths
Tonals
From Dragon Magazine:
174 - Crystalle (The Dragon's Bestiary, Matthew P. Hargenrader)
230 - Zakhur Lifesbane the Guardian (Fire in the Five Peaks, Ed Stark)
248 - Vore Lekiniskiy "Master Fire Worm" (The Dragon of Vstaive Peak, Ed Stark)
260 - An-Ur the Wandering Death, Dhrakoth the Corruptor, Mordukhavar the Reaver, Medrinia, Xathanon, Vanathor the Golden Harpist (Spawn of Tiamat, Children of Bahamut, Keith Francis Strohm)...which I've already converted, but we can always retool for the CC.
Annual 4 - Ghazneths
I4 - Oasis of the White Palm
Aeraldoth (vizier to Caliph of the Djinn)
Pasha of the Efreet (Vizier of the Fire Sultan)
...and I'm sure I'm missing more.
