Classical music, in my opinion, is too adulterated by superstar soloists, conductors, and the “high culture” aspect of it really puts it out of reach for a lot of people.
Jazz can be the same, if less so. I think there are one or two artists out there who are really just in it for money.
But to answer your question, I feel like a lot of new underground electronic, indie and hip hop (Aesop Rock, Flying Lotus, Why?, Hop Along etc. (and that’s a big etc.)) is pretty pure. Because, if you think about it, what do they really have to gain from their success? There is little fiscal attachment to the music; on the contrary, many new bands go on to split up and follow other careers. They tour, and write, etc. purely for the joy of music, and that seems best to me.
just to be clear, I am still a strong proponent, listener, and player of classical and jazz, but I feel that today’s classical and jazz scene has been too muddied by amateurs just in it for the money