Since the new milinium, year 2000 and going forward, madlib gets 100% credit for bringing a whole new sound and style to hip hop. He birthed a whole new generation of style - the whole shit that's going on in the LA beat scene right now--and the shit that moka only been on since '05-'06-- madlib is the OG of that shit with a slight nod to jay dee as well.... in terms of underground west coat mc'ing you got to give it up to pharcyde, hiero, freestyle fellowship, and the most under rated living legends crew (murs, eligh, scarub and the whole fuckn crew). Pre 2000 in terms of the g shit, of course u gotta say NWA and dj quick and all the og OGs