J. J. Johnson (Jazz/bop trombonist/session leader)
A legendary musician, James Louis Johnson's career spans over half a century, with countless sessions either as leader or as sideman, performing with most top-bop cats.
His influence is not limited to the "trombone area", and most of his tunes are standards.
Blue Note has very good starters, namely The Eminent Jay Jay Johnson volumes.
James Louis "J. J." Johnson (January 22, 1924 – February 4, 2001) was an American jazz trombonist, composer and arranger. He was sometimes credited as Jay Jay Johnson.
Johnson was one of the first trombonists to embrace bebop music. He has long been regarded as one of the leading trombonists of the post-swing era, exerting a pervasive influence on other jazz musicians.