Waylon's all good, too.
They called it Outlaw country because it went against the grain of the Nashville sound, but Waylon's songs definitely also had a real "outlaw" aspect to them, that Willie's never did.
Later they started calling it "Progressive Country." My dad was the GM at KOKE-FM at the time, and his radio station promoted all the big concerts from Willie, Waylon, Kris, Jessi Colter, Johnny Cash, and so many others. As a little tike, I got to go backstage and meet many of those legends. Pretty cool.