Common - Be
Common has a history of working with one producer for an album. He's done albums with No ID, J Dilla, The Neptunes, etc. However, the album Be and the following Finding Forever were some of the finest from the Chicago MC, and they both have the common theme of Kanye West.
On Be, Kanye West channeled his inner J Dilla to curate a perfect aesthetic for Common's consciously uplifting rhymes. A few of the beats were J Dilla originals, but the plethora of Kanye beats tied the entire project together, making it one of hip-hop's most complete albums of the 00s.