Question: What occupations did Layne Staley and Gerry Rafferty have?

Context paragraphs:
Can I Have My Money Back?: Can I Have My Money Back?  is the first solo album by Gerry Rafferty.  The distinctive cover design was by John Patrick Byrne and was the start of a long working relationship between Rafferty and the playwright.  The LP was well received, but performed poorly in charts and sales, in part because Rafferty had just left a well known band, The Humblebums.  The album also saw Joe Egan come on board, and the pair formed Stealers Wheel shortly afterwards.

Layne Staley: Layne Thomas Staley (born Layne Rutherford Staley, August 22, 1967 – April 5, 2002) was an American singer-songwriter who served as the lead vocalist of the rock band Alice in Chains, which he founded with guitarist Jerry Cantrell in Seattle, Washington, in 1987.  Alice in Chains rose to international fame as part of the grunge movement of the early 1990s, driven partly by Staley's distinct vocal style, as well as the harmonized vocals between him and Cantrell.

Layne Staley: Angry Chair: Layne Staley: Angry Chair is a biography by Adriana Rubio about Layne Staley, the lead vocalist of the rock band Alice in Chains, published in January 2003.  As it is known, the book "Layne Staley: Angry Chair — A Look Inside the Heart and Soul of an Incredible Musician" written by Adriana Rubio (Argentinean journalist and a fan of Alice in Chains), features 50 pages of photos of Staley's art work, sketches, diary entries, and childhood pictures.  It also contains an alleged last interview of Staley that Rubio claimed that she conducted less than three months before he died from an overdose of heroin and cocaine, in April 2002.  Rubio did extensive interviews with Staley's mother, Nancy Layne McCallum, and his sister, Liz (née Elmer) Coats, to write the book.  It is named after Alice in Chains' famous song, "Angry Chair".

Gerry Rafferty: Gerald "Gerry" Rafferty (16 April 1947 – 4 January 2011) was a Scottish singer-songwriter best known for his solo hits "Baker Street", "Right Down the Line" and "Night Owl", as well as "Stuck in the Middle with You" recorded with the band Stealers Wheel.

Gerry Rafferty (album): Gerry Rafferty, released in 1974 on Transatlantic Records (TRA 270) (reissues included: Visa Records [Visa 7006]), is mainly a compilation of Humblebums material that Gerry Rafferty had written and performed while in that group.  It comprises most of the serious musical content of the last two albums released by that group, with the exception of "So Bad Thinking" (which came from the backside of his "Can I Have My Money Back?"  single).  The remaining content of those two albums were mostly humorous Billy Connolly compositions, although a few musical gems can be found among them, especially the ones in which Rafferty sings harmony.  The sound and feel of this album is similar to "Can I Have My Money Back? ", his first solo effort from 1971.  All song versions on this album (except "So Bad Thinking") are available in CD form on various Humblebums compilations.

I See Red (Jim Rafferty song): "I See Red" is a song written by Gerry Rafferty's brother, Jim Rafferty.  I See Red was first recorded by Anni-Frid Lyngstad of ABBA, under the name "Frida" for her first English-language studio album, "Something's Going On".  Lyngstad's version did not chart other than South Africa, although subsequent cover versions by other artists such as the Irish folk group, Clannad, included in their album, "Magical Ring", resulted in a moderate success.  Clannad's version was the follow-up single to their breakthrough hit "Theme from Harry's Game".  Gerry Rafferty himself also recorded a version on his 1992 album, "On a Wing and a Prayer".

Tommy Eyre: Tommy Eyre (5 July 1949 – 23 May 2001) was a session keyboardist from Sheffield, England, who appeared on records by Joe Cocker, John Martyn, Alex Harvey, Greg Lake, Michael Schenker, Gary Moore, B.B. King, John Mayall, Gerry Rafferty, Tracy Chapman and Wham! .  He is perhaps most famous for playing on Joe Cocker's UK chart-topper "With A Little Help From My Friends", on which he arranged the distinctive organ introduction, and Gerry Rafferty's "Baker Street" and "Right Down the Line".

Night Owl (Gerry Rafferty song): "Night Owl" is a song by Gerry Rafferty.  It is the second track on his 1979 album of the same name.  It features a Lyricon solo played by "Baker Street" saxophonist Raphael Ravenscroft.  The song made the top five in the UK Singles Chart, and along with "Baker Street" is one of two solo efforts by Gerry Rafferty to accomplish this feat.

City to City: City to City is a 1978 album and the second studio album by Scottish singer-songwriter Gerry Rafferty.  It was Rafferty's first solo release in six years—and first release of any kind since 1975—due to his tenure in the band Stealers Wheel and subsequent legal proceedings which prevented Rafferty from releasing any new solo recordings for the next three years.  The album was strongly received, peaking at No. 1 in the US and going Platinum, as well as reaching No. 6 in the UK and achieving Gold status. " Baker Street", "Right Down the Line" and "Home and Dry" were successfully released as singles.  By October 2010, "Baker Street" had reached 5 million plays on British radio.

Mad Season (band): Mad Season was an American rock supergroup formed in Seattle, Washington in 1994 by members of three popular Seattle-based bands: Alice in Chains, Pearl Jam and Screaming Trees.  Mad Season released only one album, "Above", and is best known for the single "River of Deceit".  The band went on a semi-permanent hiatus in 1996 due to the band members' conflicting schedules and vocalist Layne Staley's problems with substance abuse.  Attempts were made in the late 1990s to revive the group without Staley; however, the band dissolved following the death of bassist John Baker Saunders in 1999.  Staley died three years later of a drug overdose.

Supporting paragraphs: Layne Staley Gerry Rafferty
Answer: singer-songwriter