Underrated by who/which standards?
I have seen so far a lots of albums that I don't consider udnerrated by me or anyone I know.
In any case, albusm who people either had bashed or that are seldom mentioned:
All The Flower Kings albums (awsome prog rock from Sweden).
All Blackmore's Night albums
Scorpions - "Fly To The Rainbow"
Black Sabbath - "Dehumanizer"
Amorphis - "Far From The Sun"
Anthrax - "Persistence Of Time"
Angra - "Fireworks"
Baron Rojo - "Tierra de Nadie"
Blue Oyster Cult - "Cultusaurus Erectus"
Cathedral - "Caravan Beyond Redemption"
Bruce Dickinson - "Skunkworks" (even Bruce hate it
)
Force Of Evil - "Force Of Evil"
Iron Maiden - "Killers"
Pink Floyd - "Animals"
Rainbow - "Down To Earth"
Saxon - "Destiny"
Steel Prophet - "Into The Void (Hallucinogen Conception)"
Suicidal Tendencies - "How Will I Laugh Tomorrow When I Can't Even Smile Today"