Where is "The Score" by The Fugees? Or "The College Dropout" by Kanye West. Those albums are every bit as good as every album on the list. "The Score" is actually better in my opinion.
Lets see I'd have a list that goes kinda liek this...
Paul's Boutique-Beatie Boys
36 Chambers-Wu Tang
Bigger and Deffer-LL Cool J
The Chronic-Dr. Dre
Licensed to Ill-Beastie Boys
Slim SHady LP-Eminem
Black Star-MOs Def
Just to Name a Few
Holy Crap! Lauryn Hill? Hmm Ill go With Pauls Boutique Beastie Boys
I'd like to see your own list of hip-hop greatness. Good suggestion. I forgot about those guys.