What albums can you think of that work best as a single unit? An album where you can't imagine just one song being played?

The Orb, Adventures Beyond The Ultraworld
The KLF, Chill Out
Portishead, Dummy

And I think Stone Roses, Stone Roses does work "best" as a single unit, though it's the furthest thing from unlistenable as separate tracks.

And, of course, Sergeant Pepper, though I think that came in your category of "given".

Peter