Gioachino Rossini

Italian composer (1792-1868), best known for the following:
 * The overture from William Tell, an otherwise rarely-played opera.
 * The Barber of Seville, from which the Factotum Aria is highly recognisable.
 * La Cenerentola, an operatic adaptation of "Cinderella".
 * Gazza Ladra, better known as The Thieving Magpie.

Basically, you know a lot of Rossini overtures. But you don't know anything about what goes after. According to the legend, Rossini was also known for being very lazy: he was lying on his bed to write, and when a piece of paper was falling, he started again from the beginning so he wouldn't have to move. He was also a noted procrastinator: he claimed to have composed The Barber of Seville in only twelve days, and to have written the famous "William Tell Overture" a few hours before the opera opened. Finally, once he'd written enough to make himself rich, he went into semi-retirement: he stopped writing operas entirely, and only composed the occasional cantata or other bit of short vocal music. The rest of his time he parlayed into his greatest passion: food. He was reportedly quite the chef.

His overtures share a similar structure, but still are ear worms taken separately.