After Gershwin, who made multiple millions of dollars on his musicals, the highest-earning composers were Johann Strauss II, Verdi, Rossini, Handel, Haydn, Rachmaninoff, Puccini, Paganini, and Tchaikovsky.
The composers made their fortunes through fees for public appearances, lessons, and commissions.
Mozart, the Guardian notes, is not on the list; the composer died penniless at age 35.