Yeah, I've been revisiting my old Sabbath albums quite a bit lately, and I think that they could definitely benefit from the old DLA treatment. Sure, they're universally recognized for their influence on (and creation of) the genre, but I've noticed that they also did quite a bit of pioneering work in the field of narrative songwriting in a heavy metal context. Check out songs like "National Acrobat," "Killing Yourself to Live," and "Wheels of Confusion" from their later period to witness the process of a band transcending the verse/chorus structures of rock'n'roll for something more based in narrative movements. I don't know if it was because they were hanging out with the Yes guys at the time (Rick Wakeman even busted out some expert synth work on Sabbath Bloody Sabbath) or what, but the Vol. 4 through Sabotage period certainly bears some investigation. Pretty great lyrics on those albums as well, even moreso than the early stuff.