scribes, sol (not really up and coming anymore), eighty4fly, wizdom, ripynt, havi blaze (tacoma, but fuck it), rain gang, the philosofist (teehee)
there are a lot of seattle artists that are already established. like knowmads. who are not up and coming...pretty damn well known. but I'm a music elitist so fuck me
they aren't together anymore though, but they are very good. they broke up and now RA Scion is solo and Sabzi is in Blue Scholars with Prometheus Brown (Geologic)