OP on a lesser system, I was dealing with the same issue. My solution was a new DAC (Weiss 501) plus using a fiber connection between the Roon core and DAC. The DAC and fiber immediately took the digital edge off the music.
Not sure if this is the case for you or not, but my glare was only present through my digital source—not my turntable—which led me down my path.
I also have a tube pre-amp; tube rolling offers a lot of possibilities to tune the sound.
And most of my ‘80s rock alway sounds horrible!