Bookmarking this awesome thread, so helpful!
I knew most of them but just discovered some new ones, so thank you very much!
Other people who work on backgrounds or have a bunch available to use in stories:
From IG:
@episodians_united
@kittyg_writes (linktree says @kittyg_episode though)
I know that @smilla.episode still has her linktree up and google drive, although her account is no longer on IG 
Another person:
@ ThorneArtStudio from the Forums
Also, if I think of more, I’ll let you know ^^