A newer one I thought was good for not alot of gore was The Night House.

Definitely second The Ritual and Hush.

I'm not sure if it counts as horror per se but Horse Girl was unsettling.

And maybe I'm dorky but The Babadook was actually really good with a kinda happy ending.

And I'm unsure if The Wailing technically fits everyone's definition of no gore. I mean, it's not a slasher movie by any means, but there is blood (although its mostly on the living) and ghosts that are definitely dead.