Hip-hop historians might go back and forth about whether Ice-T or Schoolly D invented gangsta rap, but no one can argue that it was Dr. Dre and Eazy-E who brought the sound into the mainstream with '88's Straight Outta Compton. Since that watershed moment, they've inspired an entire coast's worth of talent in Snoop Dogg, 2Pac, and Kendrick Lamar, along with 50 Cent's game changing years.