Fandoms are ever growing but from what I remember it goes *deep breath*:
Overwatch, maze runner and it's actors, teen wolf, Markiplier and his egos, fallout 3, 4, 76, and NV, idkhbtfm, legally blonde, newsies, criminal minds, NCIS, Brooklyn 99, greatest showman, darkest minds but there's not much fanfic for it, creepypasta at one point ew lol (I say, not knowing I would be back within a year), SCP too, Psych, Stardew valley, pretty much all procedural crime shows from 2000-2015, incredibox and... Other stuff I can't remember.