Franz Schubert 1797 - 1828
Franz Schubert Profile "In a short lifespan of less than 32 years, Schubert was a prolific composer, writing some 600 Lieder, ten complete or nearly complete symphonies, liturgical music, operas, incidental music and a large body of chamber and solo piano music. Appreciation of his music while he was alive was limited to a relatively small circle of admirers in Vienna, but interest in his work increased significantly in the decades immediately after his death. Felix Mendelssohn, Robert Schumann, Franz Liszt, Johannes Brahms and other 19th-century composers discovered and championed his works. Today, Schubert is ranked among the greatest composers of the early Romantic era and, as such, is one of the most frequently performed composers of the early nineteenth century. (Schubert on Wikipedia)"

I am not very familiar with Schubert's music, but I can recommend his Unfinished Symphony. Do some research to find other great pieces!