There's is only one remake, the 80s Carpenter/Russell film, I know nothing of anything later, just like these "Star Wars prequels" I keep hearing about, there's only 3 movies ...
I think the scariest sub-genre for me is like low key supernatural/haunting, you know, where something invades your home/life, people won't believe you - I also like when there's a deeper spin on that material, even the "is this real or not".
From the past decade or two, one of our all time favorites is The Babadook. It's scary, beautifully acted, filmed and written, creepy, really sticks with you.