USA by far. Andrew Sisters, Bing Crosby, Judy Garland - game over!
I’d have to agree completely, but you left out Swing, Jazz, Jive and Big Band.
Duke Ellington, Cab Calloway, Glenn Miller, etc. that music still works.
France had Edith Piaf, but otherwise I don’t think many would choose Wagner over The Duke.
Tipperary was WWI.