Louis Clark was hired by the band as string arranger.

The principal architect of Crescent City s soul was songwriter, arranger, and producer Allen Toussaint.

Michael Zager (born January 3, 1943, in Passaic, New Jersey) is an American record producer, composer, and arranger original music for commercials, albums, network television, and theme music for films.

Sir George Henry Martin CBE (born 3 January 1926) is an English record producer, arranger, composer, conductor, audio engineer and musician.

In 1966 and 1967, Sinatra charted with 13 titles, all of which featured Billy Strange as arranger and conductor.

Caetano Emanuel Viana Telles Veloso ( born August 7, 1942), better known as Caetano Veloso, is a Brazilian composer, singer, guitarist, writer, and political activist.

According to AllMusic, Jones has left his mark on rock roll music history as an innovative musician, arranger, and director.

Michael Arnold Kamen (April 15, 1948 November 18, 2003) was an American composer (especially of film scores), orchestral arranger, orchestral conductor, song writer, and session musician.

Radamés Gnattali (27 January 1906 3 February 1988) was a Brazilian composer of both classical and popular music, as well as a conductor, orchestrator, and arranger.

It was in this role that he created some of his most famous compositions, which were popularized by well known singers of the age such as Francisco Alves and Mário Reis.

Williams was known as Little Johnny Love Williams during the early 1960s, and he served as music arranger and bandleader for a series of popular music albums with the singer Frankie Laine.

Léonardo Gandelman (born Leonardo Gandelman on August 10, 1956, in Rio de Janeiro) is a Brazilian saxophonist, composer and producer.

Enrico Nicola Henry Mancini (April 16, 1924 June 14, 1994) was an American composer, conductor and arranger, who is best remembered for his film and television scores.

Carlinhos Brown (born Antonio Carlos Santos de Freitas, November 23, 1962) is a Brazilian musician, songwriter and record producer from Salvador, Bahia.

Michael Joseph Jackson (August 29, 1958 June 25, 2009) was an American singer, songwriter, record producer, dancer, and actor.

She is the daughter of famed pianist arranger César Camargo Mariano and the late Brazilian singing legend Elis Regina and sister to Pedro Mariano and music producer João Marcelo Bôscoli.

Alfredo da Rocha Viana, Jr., better known as Pixinguinha ( April 23, 1897February 7, 1973) was a composer, arranger, flautist and saxophonist born in Rio de Janeiro.

Severino (Sivuca) Dias de Oliveira (26 March 1930, Itabaiana, Brazil 14 December 2006, João Pessoa, Paraíba, Brazil) was a Brazilian accordionist and guitarist.

Joseph Raymond Ray Conniff, also known as Jay Raye (November 6, 1916 October 12, 2002) was an American bandleader and arranger best known for his Ray Conniff Singers during the 1960s.

Antônio Carlos Brasileiro de Almeida Jobim (January 25, 1927December 8, 1994) known as Tom Jobim () was a Brazilian songwriter, composer, arranger, singer, and pianist guitarist.

Leonard Albert Lenny Kravitz (born May 26, 1964) is an American singer songwriter, multi instrumentalist, record producer, actor and arranger, whose retro style incorporates elements of rock, blues, soul, R B, funk, jazz, reggae, hard rock, psychedelic, pop, folk, and ballads.

While it is highly possible that he contributed ideas to the song (the modulation types and the expanded form are closer to his style than to May's), the bottom line is that even in that case Mercury would be more a co arranger than a co writer per se (like George Martin on The Beatles' songs).