Johann Strauss, the younger (1825-1899)

The nearly five hundred works of Strauss include several operettas, like "Die Fledermaus," but he is best known as a composer of waltzes.  They were conceived as dance music but endure as concert music.  "The Blue Danube," probably his most famous waltz, is not a simple dance tune, but a series of sophisticated melodies elaborately scored for full orchestra.