Only thing I’ve been running personally has been Reno DX, to add HDR while not departing from the original look. Nice to cleanup all the colour banding on the dynamic lights in dark areas, such as the constant spotlight on Hornet. And yes, it works just fine through Proton, although I had to install it with a prepped zip file from some Reddit thread.

Here’s my last judge fight if you want to see the results (note that YT only offers HDR output on HDR compatible displays).