Had a look and couldn't find a thread (so apologies if such a thread does exist)
I saw some promoted facebook thing a few weeks back listing albums that didn't have a single bad track on them, and thought of a few myself, and would love to hear some others examples of the 'perfect' album.
So in no particular order, I think the below albums are examples of albums that don't have a single bad/weak track on them... (album covers shown because why not?)
Pink Floyd - Dark Side of the Moon

Not a whole lot needs to be said really, it's just fantastic from start to finish.
Red Hot Chill Peppers - Blood Sugar Sex Magik

A Funky masterpiece, have been listening to this lately for the first time in years, and every single track is just brilliant.
Rage Against The Machine - Rage Against The Machine

A masterpiece, but Evil Empire & The Battle of Los Angeles could also easily make this list as in my opinion, everything they did was just spectacular (even Renegades, the cover album they did).
in fact, feck it;
Rage Against The Machine - Evil Empire

Evil Empire simply takes up where their debut left off, track after track of absolute belter.
Leftfield - Leftism

For me, one of the 2 groundbreaking electronic music albums that will just never get old. Still as amazing and fresh sounding today 25 years after its release as it was back in 1995.
Daft Punk - Homework

the 2nd groundbreaking electronic music album in my opinion. Daft Punk before the masks, before the pyramids, before the light shows. It's just perfect.
Arcade Fire - The Suburbs

Another band that could justifiably have multiple entries on this list, but for me
The Suburbs is a masterpiece.
Band of Skulls - Baby Darling Doll Face Honey

Solid album that doesn't put a foot wrong really.
The Beatles - Revolver

Not a whole lot to say about Revolver, other than it's brilliant.
Bjork - Debut
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Precedes Leftism & Homework by a few years, but nonetheless excellent electronica. (one blip on an otherwise perfect album is The Anchor Song, but it's allowed based on teh strength of every other track).
DJ Shadow - Endtroducing

Sample City, but crafted by a master of his art.
Fleetwood Mac - Rumours

probably not one for the purists, but an excellent album that doesn't put a foot wrong!
Metallica - Black Album

again, the die hards will probably disagree, but its a stonker from start to finish.
LCD Soundsystem - This Is Happening

Another band that could easily have multiple entries on this list, but
This Is Happening stands out for me.
This list could clearly go on and on, but I'll leave it there, and over to you to let us know what in your opinion is a perfect album..
honourable mentions;
Cypress Hill - Black Sunday
House of Pain - House of Pain
Portishead - Dummy
Pearl Jam - Ten
Pink Floyd - Wish You Were Here
plus I'm sure many many more.......