My wife and I recently binged through “The Conjuring” extended universe.
The Conjuring
The Conjuring 2
The Conjuring: Devil Made Me Do It (not that great)
Annabelle
Annabelle Creation
Annabelle Comes Home
The Nun (Kinda boring)
The Nun 2
It’s a fun time and you can watch each of the series of movies somewhat independently of the others, but I recommend starting with Conjuring 1 and 2 first.
They’re not the greatest horror of all time, however, all but 2 of them are fun watches. Conjuring 3 and The Nun we’re pretty boring imo.