Here are most of the deities / primordials / powers /mythic beings I plan to stat in the future. Dark Dragon and Dark Force are from Phantasy star IV, so is the profound darkness which i forgot to add (CR 58, Colossal, 21,000 HP). Behemoths are from final fantasy, I renamed them in most cases for the sake of variety. Some monsters (Lamashtu, Rovagug, and many others) are from Pathfinder. This list is incomplete.
"Colossal" means that they have multiple parts and the average of all the parts is that CR. Like
@dave2008 said this is misleading so in the future I may include a "Sum" CR method that equates to the CR of all parts added up ÷ the number of parts. Some of these beings are found deep in the half-century history of D&D lore, and as such you might not find anything on them when you look them up. If there are any other powers to add to this list, let me know!