His first symphony ends w
His first symphony ends with a passacaglia and despite its odd title is actually composed of four movements.  One of this man's works, which was originally called The Serpent Heart, features a Parodos that introduces the characters and includes a notable "Dance of Vengeance."  Another of this man's pieces opens with a flute solo before other themes, including one for brasses, begin; it is the second of two Essays for Orchestra.  He was inspired by Prometheus Unbound in creating his Music for a Scene from Shelley and looked to Sheridan to compose the Overture to the School for Scandal.  Another work by this composer of the Capricorn Concerto originated as the slow movement of a Quartet in B minor and was first performed by Toscanini in 1938.  For 10 points, identify this composer of Vanessa and the Adagio for Strings.
His first symphony ends with a passacaglia and despite its odd title is actually composed of four movements.  
Samuel Barber