[lumberjim]

I think you could put Dark Side of the Moon on that list, probably The Wall, too. Floyd had great album cohesion. OF course, you know I'll say all 10 Original Led Zeppelin albums are perfect....

others for consideration:
Blind Melon's original album
Pearl Jam Ten
4Non Blondes: Bigger Better Faster More
Guns N Roses: Appetite

maybe I'm being too loose with the word perfect.... these are just albums that I can listen to straight through without finding myself waiting for this song to end because there's a better one coming.

I've long held the theory that most bands have that great first album chock full of hits because they have all that time before they get signed to develop a repertoire of their best stuff(almost like a pre best of), but then for the 2nd album there's this push from the Label to get another one out... and the quality drops off markedly. See Pearl Jam vs, Blind Melon Soup, GnR Lies.

That's what separates Zeppelin from most others. There was no bad album. No forced offering. Possibly because they stole most of the stuff on the first two albums...and then created their own Label, and were not pressured.