well, if we are accepting entire albums then I nominate The Moray Eel eats the Holy Modal Rounders.
And no acid folk album mixed inspiration and lunacy in as downright deranged a fashion as The Moray Eels Eat the Holy Modal Rounders
, the Holy Modal Rounders' sole LP for Elektra Records.
Here was the Rounders' chance to mix all of the roots folk that had informed their work since their formation into a blender, topped off with some seriously wacko drugged-out strangeness and hard rock. Jug band, country, blues, ragtime, folk-rock--everything segued in and out of each other, figuratively and literally. The stringing together of uninterrupted song fragments into side-long suites was much in keeping with the approach used by the Mothers of Invention on We're Only in It for the Money, and less famously on side two of the Fugs' It Crawled into My Hand, Honest. As strokes of mad genius go, it was a winner, managing to just about walk the tightrope between art and chaos. Given just how chaotic the production of the record was, though, it's something of a miracle that the album was made in the first place, let alone eventually enshrined as a cult classic.