I use the term "polymath" in quotes, because I'm recoining its definition -- i.e., limited to
within the area of classical music.
What composers were (or are) considered "masters" in multiple styles, periods or genres of classical music?For example, Samuel Barber, in additon to his popular romantic lyricism, seems to have covered many bases:
"Later he added Debussy, Stravinsky (Capricorn Concerto, 1944), polytonality (Second Symphony, 1944), atonality (Medea, 1946; Prayers of Kierkegaard, 1954), 12-tone rows (Nocturne, 1959; Piano Sonata), jazz (Excursions, 1944; Hand of Bridge, 1959)." (from
Schirmer)
In a way, this is an unrealistic question because modern composers have the advantage of choosing all the stuff from the past.
But in no way does being a compositional "polymath" imply that one is superior to "nonpolymaths". In the area of science, Newton was and Einstein wasn't!