A rough top ten album list, liable to change as I think of more of my favorite hip hop albums.
1. Enter the Wu-Tang, Wu-Tang Clan
2. Illmatic tied with Stillmatic, and (Untitled), Nas
3. Let's Get Free, Dead Prez
4. Lifestylez Ov Da Poor and Dangerous, Big L
5. Aquemini, Outkast
6. Rough Draft, J-Dilla
7. Southernpalalisticadillacmusi, Outkast
8. ATLiens, Outkast
9. Ready to Die, B.I.G.
10. Midnight Marauders, A Tribe Called Quest
Theres a lot of runner ups, and i'm sure i'm forgetting a few of my top 10.