[Starboard]

Have to consider Bob Rock for his work with Metallica and Motley Crue and others. Even if you're not a fan, those bands had many high impact albums.

Also Mutt Lange for work with Def Leppard, AC/DC, Foreigner and Shania Twain.

[Clemenza]

Mutt Lange’s best work was on “Back in Black.” He also has fine taste in women.

[Recovering_Democrat]

I had forgotten Mutt Lange...also someone else mentioned Rick Rubin; his work with Johnny Cash was phenomenal.