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

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.

YES, Tales from topographic oceans

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.

spirit- 12 dreams of Dr.SARDONICOUS. PRETTY THINGS-SF SORROW,THE WHO-TOMMY,QUADRAPHENIA,