Sure I'm in.  I guess my first thought is, when we say underrated, by whom?    These things change over time of course.    But pedantry aside, how about Sebadoh's Harmacy (the one after Bakesale), Malkmus' first solo record, or The Rolling Stones Between the Buttons?    All considered relative disappointments but outside of the context of their other releases, are great records.   I will throw out some others with a bit more thought.