More on topic post.
I guess I kinda have all of them in my world.
The basic history of the mythology was that all the gods of my settings were basically various good and neutral aligned outsiders that looked at the other various material planes, like Toril, Exandria, and the like and decided that they would try to do something like that. They ended up gathering mortal souls who wanted to go with them, and set off to an unclaimed part of the multiverse and started working on the world. The gods ended up expending a lot of power actually making the world and populating it with people, so they had to go back deep into their various planes, accidentally leaving the newborn world unguarded from various planar ne'er-do-wells, In particular the Aboleths, who ended up blocking the world from contact between the beings there and the gods who would more than likely save them.
However, the gods weren't going to let the suffering of the world they created and the people they invited continue, so they ended up devising plans to break through the barrier, defeat the Aboleths, and free the people. Soon after doing so, though, they ended up facing something that could possibly be worse. You see, mortals, as a collective, have a lot more power than even they realize. During the occupation by the Aboleths, a small mote of pure negative energy (Not the undead type, mind) was created, and every bit of suffering, despair, and evil thoughts by the mortals was funneled into it, and after the gods broke though the barrier and defeated the Aboleths, the sheer amount extra divine energy that was blocked by the barriers that the Aboleth's set up ended up causing that mote of energy to coalesce into a monster that was called The White.
The White ended up rampaging across the world, creating various monsters and infecting a large amount of the people of the world with a deep, nihilistic madness. The gods, hoping to defeat The White, ended up sending various divine servants and demigods at the beast, but all of them ended up falling in battle against it, or worse, ended up infected by it's madness, becoming the various evil gods, often the anethema of the god that spawned them (For example, the servant of the god of medicine ended up becoming the god of disease, the servant of the god of law ended up becoming the god of tyranny, etc) It took the gods creating multiple beings (The Tarrasque being one of them) to essentially drive The White out of reality. After doing so, the gods decided to reuse the Aboleth's planar barriers to lock The White, the evil gods, and themselves away from the world, so they could either come up with a plan to restrict The White and the evil god's influence on the world, or failing that, just prevent the people of the world from accessing any form of divine power for their own safety.
This ended up not lasting. After a while, the barrier that was created started leaking (creating Tieflings and Aasimar in the process) and like a whole in cloth being repeatedly mess with, ended up tearing open completely with the ascension of two mortals to full godhood, the first, a vengeful paranoid murderer, and the second, a being of devotion and mercy. Other people have ascended since then each a paragon of the things that they were in life.
Sorry for the word vomit, It's just been something I've been holding in for a while