Most Influential American Musician of All Time?

most prolific composer- Richard Rodgers
musician- Satchmo
performer- Garland
singer- Ella
spiritually inspired- coltrane
educator/mentor- l.bernstein
breakdown by instrument:
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by genre:
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- you get the idea. talent takes so many forms.
try deciding who your favorite actor is while you're at it.
i could go on for hours expounding on all of the incredible talent; then directors, writers, photography,...

Irving Berlin
Bob Dylan
Cole Porter

Scott Joplin

How 'bout Les Paul?

Miles Davis, Robert Johnson, Duke Ellington, Louis Armstrong, Irving Berlin, George Gerswin, and Elvis Presley, in no particular order.

The question itself is subjective, and therefore has to definitive answer.

Cheers,
John