https://archive.org/details/etree has a lot of really great music. It's live show recordings. IMO about 90% of it is not that good or so-so, and 10% is great, and with the amount of music they have that turns out to be a lot of great stuff.
Steve Kimock, String Cheese Incident and Green Light are some of my favorite bands on there.
Here's a great show from Green Light. I would say they're bluesy rock.