This list includes fictional representations of real (named) composers and musicians, and fictional characters under other names that are generally agreed to be based on a specific composer, or sometimes a composite of several.
Johann Sebastian Bach Arnold Bax Ludwig van Beethoven Bix Beiderbecke William Sterndale Bennett Hector Berlioz Lord Berners Hildegard of Bingen Mario Braggiotti Benjamin Britten Thomas Busby Frédéric Chopin Harriet Cohen Michael Costa Noël Coward Christian Darnton Claude Debussy Frederick Delius Edward J Dent Delia Derbyshire Arnold Dolmetsch Edward Elgar César Franck George Gershwin Carlo Gesualdo Jimmy Glover Eugene Aynsley Goossens Glenn Gould Cecil Gray Jan Hambourg George Frideric Handel Josef Matthias Hauer Charles Edward Horsley John Pyke Hullah Halfdan Jebe Maurice Jacobson Joseph Joachim Aram Khachaturian Constant Lambert Henry Lawes Madame Levinskaya Franz Liszt Elisabeth Lutyens Alma Mahler Gustav Mahler Florence Ashton Marshall (and her sister, the clarinettist Frances Marshall) Fanny Mendelssohn Felix Mendelssohn Noel Mewton-Wood Wolfgang Amadeus Mozart Hubert Parry Helen Perkin Sergei Prokofiev Maurice Ravel Gioachino Rossini Harold Rubens Anton Rubinstein Camille Saint-Saëns Antonio Salieri Godfrey Sampson Erik Satie Arnold Schoenberg Franz Schubert Clara Schumann Robert Schumann Dmitri Shostakovich Jean Sibelius Ethel Smyth Kaikhosru Sorabji Barbara Strozzi Arthur Sullivan Kay Swift Antonio Vivaldi William Walton Richard Wagner Peter Warlock Hugo Wolf Carl Friedrich Zelter