so instead I'll mention Theodor W. Adorno, who has some good insights but whose crass misogyny and bizarrely doctrinaire elitism have gotten a free pass in capital-L Leftist (or "Left"-as-an-adjective) circles for way too long.
A wonderful anecdote of Richard Taruskin's, that may be relevant:
When I vented a rather vehement anti-Adornian position, somewhat along the lines of what will follow here, before a German audience in Berlin last year and encountered surprisingly little resistance, I asked one of my hosts about it and was told, "Oh my dear, Adorno is your problem now."