These don't have to be the most acclaimed, just the ones you like most. For me its:

1) Mac Miller - Swimming 2) Jungle Brothers - Done By The Forces of Nature 3) A Tribe Called Quest - Midnight Marauders 4) Kendrick Lamar - Good Kid, M.A.A.D City 5) Nas - Illmatic 6) Eminem - The Marshall Mathers LP 7) Kid Cudi - MOTM1 8) Ice-T - O.G: Original Gangster 9) Kanye West - The College Dropout 10) Common - Be 11) Pusha T - Daytona 12) Jay-Z - Reasonable Doubt 13) Mobb Deep - The Infamous 14) Freddie Gibbs - Pinata 15) Kanye West - Graduation 16) Cypress Hill - Black Sunday 17) Madvillain - Madvillainy 18) Conway The Machine - La Maquina 19) The Notorious B.I.G - Ready To Die 20) Wu Tang Clan - 36 Chambers

These are just my choices, would love to hear yours!