I've been listening to soul music lately, and don't get me wrong, I really like it, but just out of curiosity I was wondering if there were soul musicians who are kind of less commercial, and musically more sophisticated? The type of soul I'm aware of is rather simple and intuitive if you analyze it, and I know soul music isn't meant to be written like Bach fugues or Gil Evans arrangements but I'm just asking.
Any help will be apprecited.
I didn't find the right solution from the Internet.