The leader of one of the few white bands regarded as "hot" by black jazz musicians, he popularized swing for the broader American population. In a racially segregated America, he crossed the color line by hiring African Americans to play in his combos.

Benny Goodman

Explanation:

Benny Goodman was an influential musician on the American jazz scene. He played clarinette and became an important musician in a musical genre dominated by big African-American names.

The competition that Benny Goodman faced in this medium was great. That's because in addition to competing with talented musicians, he had to overcome a possible "exclusion" from an environment dominated and well executed by blacks.

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