For those of you who want to see real evolution in music, after listening to ordered JS Bach, listen to the works of one of his sons, Carl Philipp Emanuel Bach. The jump is amazing, the son having almost a "jazzy" style compared to the father.
J.S. Bach was considered old fashioned in his day. And Glenn Gould once said, when asked his opinion of Jazz, that no one swung better then Bach.
What do you recommend?