Question: Which French baryton-martin had a close artistic association with a French composer who wrote 1959's "Gloria"?

Context articles: Oskar Kallis
Amédée Lynen
Tristan Klingsor
Hanns Eisler
Betty Fibichová
Klapa Šufit
Francis Poulenc
Pierre Bernac
Colin Horsley
Camille Maurane

Oskar Kallis (Tallinn, November 23, 1892 - Yalta, 1 January 1918) was one of the main representatives of the Estonian national romanticism.
 He studied in 1907 and 1913 to 1916 in the studio of the artist Ants Laikmaa, and in 1912-1913 studied design at the Estonian Artist Society (Eesti Kunstiselts).
 He participated in 1917 in the establishment of the artistic association Vikerla.
 He was particularly influenced by the Finnish painter Akseli Gallen-Kallela, he devoted himself especially in his short career to the illustration of the Estonian national epic Kalevipoeg, creating about 40 works.
 He also designed ethnographically styled furniture and textiles.
 He died of tuberculosis in the Crimea in 1918.
Amédée Ernest Lynen (1852–1938), who often signed his works Am.
 Lynen, was a Belgian painter, illustrator and writer.
 In 1880, he was one of the founders of the artistic group L'Essor after it had separated from the academy, and he co-founded its successor Pour l'Art in 1892.
 In 1895, he founded the "Compagnie du Diable-au-corps", an artistic association which organised evenings with theatre and poetry, and which existed at least until 1899.
 It also published a satirical newspaper, "Le Diable au Corps".
 In 1903, two works on paper were bought by the Royal Museums of Fine Arts of Belgium.
 In 1930, a retrospective of his works was organised by the Cercle Artistique et Littéraire in the Vauxhall, Brussels.
Tristan Klingsor, birth name (Arthur Justin) Léon Leclère (born Lachapelle-aux-Pots, Oise department, 8 August 1874; died Paris, August 1966), was a French poet, musician, painter and art critic, best known for his artistic association with the composer Maurice Ravel.
Hanns Eisler (6 July 1898 – 6 September 1962) was an Austrian composer.
 He is best known for composing the national anthem of the German Democratic Republic, for his long artistic association with Bertolt Brecht, and for the scores he wrote for films.
 The Hochschule für Musik "Hanns Eisler" is named after him.
Betty Fibichová (16 March 1846 – 20 May 1901) was a Czechoslovak opera singer and the wife of composer Zdeněk Fibich.
 The greatest Czech operatic contralto of her day, she enjoyed close artistic partnerships with both Antonín Dvořák and Bedřich Smetana in addition to collaborating frequently with her husband.
Klapa Šufit is a cultural - artistic association from Split, Croatia.
Francis Jean Marcel Poulenc (] ; 7 January 189930 January 1963) was a French composer and pianist.
 His compositions include "mélodies", solo piano works, chamber music, choral pieces, operas, ballets, and orchestral concert music.
 Among the best-known are the piano suite "Trois mouvements perpétuels" (1919), the ballet "Les biches" (1923), the "Concert champêtre" (1928) for harpsichord and orchestra, the Organ Concerto (1938), the opera "Dialogues des Carmélites" (1957), and the "Gloria" (1959) for soprano, choir and orchestra.
Pierre Bernac (12 January 1899 – 17 October 1979) was a French baryton-martin who became the most renowned interpreter of the French art song, and had a close artistic association with Francis Poulenc.
Colin Robert Horsley {'1': ", '2': ", '3': ", '4': "} (23 April 1920 – 28 July 2012) was a New Zealand classical pianist and teacher who was based in the United Kingdom all his working life.
 He had a significant artistic association with the composer Sir Lennox Berkeley.
Camille Maurane (November 29, 1911 – January 21, 2010), born Camille Moreau, was a French baryton-martin singer.
 His father was a music teacher and he started singing as a child in the Maîtrise Saint-Evode in Rouen.
 The sudden death of his mother and family upheaval meant a break of twelve years in regular singing.