If you're after classic rock albums that have been forgotten or overlooked, it's worth listening to Skylarking by XTC and Tim by The Replacements.
Listening to "Trixies" is like cracking open an old notebook you'd forgotten in a drawer -- the handwriting younger, the ideas restless, the voice already familiar.
Arguably the fullest distillation of music there can be, there have been some powerful trios in the history of popular music.