Some great suggestions, but one or two I would add. Firstly, on the grounds of the music itself, the German label, Stockfisch. Great recording technique, but great artists, Sara K, David Munyon, amongst them. The Sara K recording "Waterfall", is one of my all time favourites for the recording quality and the music. The next suggestion is Proprius, I don't
think anyone has mentioned it, good recording and good music.
So many labels have great recordings, but of noodling Jazz combos, etc. What you might classify as Elevator Music, sorry Naim, I mean you.