What a coincidence, I was looking at the same thing today. I kept seeing recommendations for Affinity Photo, apparently it has a wide range of features for both Windows and macOS users. It’s got PSD file support, RAW support, masking, layering, retouching, blemish removal, curving, and a comprehensive set of 16-bit filters.

It’s around $50 I think but you own the license forever.

EDIT : I just noticed that this is the Open Source community so I just wanted to mention that Affinity is clearly not that.