Have you listened to Alice isn't Dead? It's in a sort of grey area where it could be interpreted as sci fi or supernatural horror. It's by the creators of welcome to nightmare but way more suspenseful and creepy with less of the light hearted comedy elements.

I'll definitely check it out! Book Annihilation is very different than movie Annihilation although until I read Chaga I can't really give an opinion on whether it's ripping off anything from it. I did a fair bit of research about the book for a university essay and didn't find any secondary sources comparing the two that I can remember.

I've been going through all these suggestions with my friend trying to figure out where to start, and we ended up watching Coherence at like 2am last night. I loved it thanks so much for recommending!

I didn't personally enjoy Blade Runner or do androids dream of electric sheep, maybe I should give some of his other works a go though. I know he's considered an OG. I subscribed to the Dracula mailing list thing so have been reading it for about half a year now haha