David Gray comes to mind. He recorded White Ladder at home by himself, and published it himself.
Tom Petty also comes to mind. He was in litigation over control of his own product for years, and has also made and recorded songs (such as The Last DJ) about the corruption of money in the music business.
@zenvelo I knew Tom Petty’s first mother in law for a long time. There was also a terrible housefire, of an iconic house they lived in that burnt to the ground. It was a long legal thing too.