Butch Vig had such a large influence in my life as a teenager. For those that never paid attention to the liner notes/credits on their music, Butch was a producer on so so many bands.
Plus, he's in Garbage, a great band in its own right, with an amazing sound. Vig defines the post-grunge sound that took over rock in the 90s: powerful choruses, vocals up front, tight production. Very different from the garage sound of proper grunge.