jasontheexploder at https://www.flickr.com/photos/26251139@N00/ · CC BY 3.0

Rick Rubin co-founded Def Jam Recordings out of his NYU dorm room and produced the early records — for LL Cool J, Run-DMC, the Beastie Boys — that helped bring hip-hop into the mainstream. He went on to shape hit records across rock, metal and country with a spare, stripped-down production style, was named the "most important producer of the last 20 years" by MTV in 2007, and was inducted into the Rock and Roll Hall of Fame in 2026.