Immortal
Arcane

https://1d4chan.org/wiki/Ed_Greenwood
1d4chan seems down atm, but it has a nice write up on how Forgotten Realms became Eds personal sex dungeon over time. It has always been a place of debauchery.
I mean this is a well established meme across the internet.
Elminster is such a visceral implementation of "Gary Stu" and so obviously is a self-insert. He fucks Mystra and the Simbul and just about every other bardmaid and witch across the Realms.
Even does a short stint as a female (and fucks around as that too)
All that said, Salvatore and Cunningham are responsible for all the Drow Debauchery AFAIK.
The whole demon orgy thing was 100% Salvatore, as was the incest and whips and slavery - quite honestly many Forgotten Realms novels are generally just a few degree's removed from pure smut.
I was curious if there was more salacious stuff going on.
Still waiting for the Monster Manual page on Drow "Futa" as well.