Oh, Eminem - The Marshall Mathers LP
Enter the Wu-Tang Clan
Yeah, I'd just like to add - BRING THE MUTHAFUCKIN RUCKUS.
It's just occurred to me that he's said essential rap, not essential rap albums.
ODB - Got Your Money
Eminem - Sing For The Moment
Lupe Fiasco - Superstar
Kanye West - Diamonds From Sierra Leone
Tupac feat. Dr. Dre - California Love - If you only get ONE rap song, make it this one.
Snoop Dogg - Who Am I?
The Fresh Prince and DJ Jazzy Jeff - Summertime