For 10 points—name this composer of The Thieving Magpie who wrote about the murder of Gesler by the title character, who sings the aria "Sois immobile" in his opera William Tell.
He wrote an opera about a character who often repeats the phrase "Oh, it's so hot", and contains the songs "Va tutto ben" and "Per un figlio gia pentito", while another opera by this composer contains the arias "Tu che i miseri conforti" and "Or che dici?  or che respondi?" and focuses on an exiled Syracusean soldier in love with Amenaide.  This composer of Il Signor Bruschino and Tancredi wrote an opera in which Selim and Zaida fall in love and Geronio forgives Fiorilla, The Turk in Italy, and wrote about Fabrizio Vingradito accusing Ninetta of stealing a spoon in an opera which contains the notable aria "Deh, tu reggi in tal memento".  For 10 points—name this composer of The Thieving Magpie who wrote about the murder of Gesler by the title character, who sings the aria "Sois immobile" in his opera William Tell.
He wrote an opera about a character who often repeats the phrase "Oh, it's so hot", and contains the songs "Va tutto ben" and "Per un figlio gia pentito", while another opera by this composer contains the arias "Tu che
Gioachino Rossini