Miles Dewey Davis III (May 26, 1926 – September 28, 1991) was an American jazz trumpeter, bandleader and composer. He was very important to 20th century music. He helped to develop several different styles of jazz, like cool jazz, hard bop, free jazz, and fusion. As a bandleader he worked with other famous musicians like John Coltrane, Herbie Hancock, Bill Evans, Wayne Shorter, Chick Corea, John McLaughlin, Cannonball Adderley, Gerry Mulligan, Tony Williams, George Coleman, J. J. Johnson, Keith Jarrett, John Scofield and Kenny Garrett.