Question: In between Ludwig van Beethoven and Heinrich Marschner who was the most important composer of German opera between Weber and Wagner?

full_context: Document 1: Heinrich Marschner: Heinrich August Marschner (16 August 1795 – 14 December 1861) was the most important composer of German opera between Weber and Wagner.
Document 2: Late piano sonatas (Beethoven): The late piano sonatas of Ludwig van Beethoven usually refer to the last five piano sonatas the composer composed during his late period.
Document 3: Beethoven and his contemporaries: During the course of his lifetime (1770–1827), Ludwig van Beethoven enjoyed relationships with many of his musical contemporaries. Beethoven was famously difficult to get along with, and the history of his relationships with contemporaries is littered with arguments, misunderstandings, and reconciliations. Beethoven had well-known fallings out with his one-time teacher, Joseph Haydn, with the piano virtuoso and composer Johann Nepomuk Hummel, and the German composer Carl Maria von Weber.
Document 4: Symphony No. 9 (Beethoven): The Symphony No. 9 in D minor, Op. 125, is the final complete symphony composed from 1822 to 1824 by the German composer Ludwig van Beethoven. It was first performed in Vienna on 7 May 1824. The symphony is one of the best-known works in common practice music. It is widely viewed by critics as one of Beethoven's greatest works, the pinnacle of musical Classicism, and one of the greatest compositions in the western musical canon. The symphony was the first example of a major composer using voices in a symphony (thus making it a choral symphony). The words are sung during the final movement by four vocal soloists and a chorus. They were taken from the "Ode to Joy", a poem written by Friedrich Schiller in 1785 and revised in 1803, with text additions made by the composer. In the 2010s, it stands as one of the most performed symphonies in the world.
Document 5: Ludwig van Beethoven (1712–1773): Ludwig van Beethoven the Elder, also Ludovicus van Beethoven and Lodewijk van Beethoven (January 5, 1712 – December 24, 1773) was a professional singer and music director, best known as the grandfather of the composer Ludwig van Beethoven.
Document 6: Ludwig van Beethoven: Ludwig van Beethoven ( , ; ] ; baptised 17 December 177026 March 1827) was a German composer and pianist. A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers. His best-known compositions include 9 symphonies, 5 piano concertos, 1 violin concerto, 32 piano sonatas, 16 string quartets, his great Mass the "Missa solemnis", and one opera, "Fidelio".
Document 7: Der Freischütz: Der Freischütz , Op. 77, J. 277, (usually translated as "The Marksman" or "The Freeshooter") is a German opera with spoken dialogue in three acts by Carl Maria von Weber with a libretto by Friedrich Kind. It premiered on 18 June 1821 at the Schauspielhaus Berlin. It is considered the first important German Romantic opera, especially in its national identity and stark emotionality.
Document 8: Hans Heiling: Hans Heiling is a German Romantic opera in 3 acts with prologue by Heinrich Marschner with a libretto by Eduard Devrient, who also sang the title role at the première at the Königliche Hofoper (now Berlin State Opera), Berlin, on 24 May 1833, and went on to become Marschner's most successful opera. The opera brought the composer a considerable reputation, although this did not materially affect his position in Hanover, where he was music director of the Court Theatre. Like Marschner's other great success, "Der Vampyr", the plot of "Hans Heiling" makes great use of supernatural elements. As with several of his operas, "Hans Heiling" is based on a folk legend.
Document 9: Carl Maria von Weber: Carl Maria Friedrich Ernst von Weber (18 or 19 November 1786 5 June 1826) was a German composer, conductor, pianist, guitarist and critic, and was one of the first significant composers of the Romantic school.
Document 10: 524 Fidelio: 524 Fidelio is a large minor planet with a diameter of 71 km, orbiting the Sun near the center of the main asteroid belt. Fidelio contains both metals and carbon (Spectral class XC). Concerning its name, the "Catalogue of Minor Planet Names and Discovery Circumstances" notes, "This is the name of Leonora when disguised as a man in the opera "Fidelio" (composed 1805) by the German composer Ludwig van Beethoven. The name dates from a period when Max Wolf assigned the names of female operatic characters to asteroids he had newly discovered.
Document 11: Ludwig van Beethoven: Ludwig van Beethoven ( , ; ] ; baptised 17 December 177026 March 1827) was a German composer and pianist. A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers. His best-known compositions include 9 symphonies, 5 piano concertos, 1 violin concerto, 32 piano sonatas, 16 string quartets, his great Mass the "Missa solemnis", and one opera, "Fidelio".
Document 12: Richard Wagner: Wilhelm Richard Wagner ( ; ] ; 22 May 181313 February 1883) was a German composer, theatre director, polemicist, and conductor who is primarily known for his operas (or, as some of his later works were later known, "music dramas"). Unlike most opera composers, Wagner wrote both the libretto and the music for each of his stage works. Initially establishing his reputation as a composer of works in the romantic vein of Weber and Meyerbeer, Wagner revolutionised opera through his concept of the "Gesamtkunstwerk" ("total work of art"), by which he sought to synthesise the poetic, visual, musical and dramatic arts, with music subsidiary to drama. He described this vision in a series of essays published between 1849 and 1852. Wagner realised these ideas most fully in the first half of the four-opera cycle "Der Ring des Nibelungen" ("The Ring of the Nibelung").
Document 13: Missa solemnis (Beethoven): The Missa solemnis in D major, Op. 123, is a solemn mass composed by Ludwig van Beethoven from 1819 to 1823. It was first performed on 7 April 1824 in St. Petersburg, Russia, under the auspices of Beethoven's patron Prince Nikolai Galitzin; an incomplete performance was given in Vienna on 7 May 1824, when the Kyrie, Credo, and Agnus Dei were conducted by the composer. It is generally considered one of the composer's supreme achievements and, along with Bach's Mass in B minor, one of the most significant Mass settings of the common practice period.
Document 14: Heinrich Schütz: Heinrich Schütz (] ; 18 October [O.S. 8 October] 1585 – 6 November 1672) was a German composer and organist, generally regarded as the most important German composer before Johann Sebastian Bach and often considered to be one of the most important composers of the 17th century. He wrote what is traditionally considered to be the first German opera, "Dafne", performed at Torgau in 1627, the music of which has since been lost.
Document 15: Giacomo Meyerbeer: Giacomo Meyerbeer (born Jacob Liebmann Beer; 5 September 1791 – 2 May 1864) was a German opera composer of Jewish birth who has been described as perhaps the most successful stage composer of the nineteenth century. With his 1831 opera "Robert le diable" and its successors, he gave the genre of grand opera 'decisive character'. Meyerbeer's grand opera style was achieved by his merging of German orchestra style with Italian vocal tradition. These were employed in the context of sensational and melodramatic libretti created by Eugène Scribe and were enhanced by the up-to-date theatre technology of the Paris Opéra. They set a standard which helped to maintain Paris as the opera capital of the nineteenth century.
ground_truth: Heinrich August Marschner