Mancini (1924–1994) took home 20 Grammys in his lifetime.
He's been gone for 23 years, but the songs he's written, like "Moon River" from Breakfast at Tiffany's and "The Pink Panther Theme," will live on forever.
Jazz musician Metheny also has 20 Grammy wins.
In addition to his impressive on-stage career, Metheny also loves teaching music. At 18, he was the youngest teacher ever at the University of Miami, and at 19 he became the youngest teacher ever at the Berklee College of Music, where he also received an honorary doctorate in 1996, according to his website.