From Tanya Tucker's decidedly Outlaw 'T.N.T' to Waylon Jennings' romanticizing 'I've Always Been Crazy'
From Johnny Cash's 'At Folsom Prison' to Dolly Parton's 'Just Because I'm a Woman'
From "Tulsa Time" to "Good Ole Boys Like Me," the key tracks of the country vocalist, who died September 8th at 78
From 1972's stunning 'Glen Travis Campbell' to a 1974 tribute to Hank Williams, some of the late country star's best work is largely unknown
From architects of the genre like Hank Williams and Jimmie Rodgers to game-changers Garth Brooks and Shania Twain