The Beatles: Let It Be, Revisited (1970)
It also helped resurrect an album that is generally considered one of their weaker efforts. And while I still find it to be a (relatively) lesser entry in their run of truly astonishing albums from '65-'70, certainly well short of Abbey Road (their final recording, though it was released before the posthumous Let It Be), I have increasingly come to love it in its own way. It's rough and messy, even more so than the sprawling White Album, but with brilliant gems amid some more half-assed yet still enjoyable toss-offs.
There are myriad versions of the record available--the original recording (produced by Phil Spector); the Let It Be, Naked version (which stripped away some of Spector's excesses and trimmed some of the studio chatter as well as live elements from the famed rooftop performance); and the alternative Glyn Johns production (which, even cleaned up from my old bootleg and officially released as part of the latest reissue package, I find pretty meh).