Originality, virtuosity, invention, quotation, innovation: in short, the complete musician, all bursting with a joy you cannot get from any other music. God's gift to America: Louis Armstrong.
[ This is not a comprehensive list, nor is it representative of the "most important" or "best." Instead, following Duke Ellington's adage that the greatest music and musicians are "beyond category", I'm starting 2020 by sharing 100 jazz tunes I feel everyone should have the chance to hear--really just tunes and performances that I love. ]