Bands that had a "masterpiece", w/ common theme

Audiofeil, take a chill pill. I don't think anyone asked for your opinion on who you consider an artist either.

Thanks but nobody forces you to read my opinions as well.

Maybe you should give a listen to Kenny G's latest release; it's called "Chronic Cyclonic".

Puts me to sleep.

The Cure: Disintegration.

Just off the top of my head...

Okkervil River "Black Sheep Boy"
Okkervil River "the Stage Names"
Okkervil River "the Stand Ins"

Tool "Lateralus"

M. Ward "Transfiguration of Vincent"

John Fahey "Blind Joe Death" along with the various later rereleases.

Built to Spill "Perfect from Now On"

Modest Mouse "The Moon and Antarctica"

Frank Zappa "joe's garage" although the entire output of Zappa should be considered a masterpiece with a common theme considering how he cut and pasted live performances with studio material all the time.