20 Top Relevant Hip Hop Groups?

Here are mine in no order: Cypress Hill, EPMD, Public Enemy, 3rd B, Tribe Called Quest, Geto Boys, Outkast, The Roots, Pete Rock and CL Smooth, Gang Starr, BDP, Wu Tang, NWA, Beastie Boys (come on they have been around how long?), RUN DMC, Black Starr, Sugar Hill Gang, Eric B and Rakim, De LA Soul, Mob Deep. What's Yours'??