Beethoven quartet opus 135, especially the third movement. Several others, about an album or two worth of music. Ravel’s quartet is up there. I melt when I hear George Duke’s rhodes solo on Blessed Relief (a great piece overall). Stuff like that.
In this version: https://youtu.be/BBeXF_lnj_M?si=kPTUsAB19_RyECO5