Question: Which musician formed the group Supertramp, Rick Davies or Anders Nyström?

Context articles: Rick Davies (footballer)
Brother Where You Bound (song)
Rick Davies
Katatonia
Bloodbath
Anders Nyström
Supertramp
Brother Where You Bound
Diabolical Masquerade
Cannonball (Supertramp song)

Rick Davies (born Evan Rick Davies, 8 April 1952) is a former Australian rules footballer who played with Sturt and South Adelaide in the South Australian National Football League (SANFL) and Hawthorn in the Victorian Football League (VFL).
 Nicknamed the "Jumbo Prince", Davies played a total of 390 games throughout his career (317 for Sturt, 33 for South Adelaide, 20 for Hawthorn, and 20 State Games for South Australia.
 Though not tall for a ruckman at only 188 cm (6'1"), Davies was known for his strong marking and body strength which he used to great effect against opponents who were often taller and heavier than him.
"Brother Where You Bound" is the epic length title track to Supertramp's 1985 album of the same name.
 Written and sung by keyboardist Rick Davies, it is the longest song Supertramp ever recorded clocking in at 16 and a half minutes (surpassing "Try Again" from their 1970 self titled debut album by more than three minutes).
Richard "Rick" Davies (born 22 July 1944) is an English musician, singer and songwriter best known as the founder, vocalist and keyboardist of progressive rock band Supertramp.
 He is the only original member of the band who is still active with them, and has composed some of their most well-known songs, including "Goodbye Stranger", "Bloody Well Right", "My Kind of Lady", and "Cannonball".
 He is generally noted for his sophisticated blues and jazz-influenced progressive rock compositions and cynical lyrics.
Katatonia is a Swedish metal band formed in Stockholm in 1991 by Jonas Renkse and Anders Nyström.
 The band started as a studio-only project for the duo, as an outlet for the band's love of death metal.
 Increasing popularity lead them to add more band members for live performances, though outside of the band's founders, the lineup was constantly changing, revolving door of musicians throughout the 1990s, notably including Mikael Åkerfeldt of the band Opeth for a period.
 After two death/doom albums, "Dance of December Souls" (1993) and "Brave Murder Day" (1996), problems with Renkse's vocal cords coupled with new musical influences lead the band away from the screamed vocals of death metal to a more traditional, melodic form of heavy metal music.
 The band released two more albums, "Discouraged Ones" (1998) and "Tonight's Decision" (1999), before settling into a stable quintet lineup for all of 2000's.
 The band released four more albums with said lineup - "Last Fair Deal Gone Down" (2001), "Viva Emptiness" (2003), "The Great Cold Distance" (2006), and "Night Is the New Day" (2009), with the band slowly moving away from their metal sound while adding more progressive rock sounds to their work over time.
 While lineup changes started up again into the 2010s, Renkse and Nyström persisted, and the band continued to release music, including "Dead End Kings" (2012) and their most recent, their tenth studio album, "The Fall of Hearts", released on May 20, 2016.
Bloodbath is a Swedish death metal supergroup from Stockholm, formed in 1998.
 The band has released four full-length albums, two EPs and two DVDs depicting their performances at Wacken Open Air (in 2005) and Bloodstock Open Air (in 2010).
 The group comprises Martin Axenrot (Opeth), Anders Nyström (Katatonia), Jonas Renkse (Katatonia), Nick Holmes (Paradise Lost), and Per Eriksson, who was previously the guitar technician for both Bloodbath and Katatonia.
Anders Nyström (born April 22, 1975), also known as Blakkheim (or formerly Blackheim) is a Swedish guitarist.
Supertramp (known as Daddy in 1969–1970) are an English rock band formed in London in 1969.
 Though their music was initially categorised as progressive rock, they later incorporated a combination of traditional rock, pop, and art rock into their music.
 The band's work is marked by the songwriting of founders Rick Davies and Roger Hodgson and the prominent use of Wurlitzer electric piano and saxophone.
Brother Where You Bound is the eighth studio album by the English rock band Supertramp, released in 1985.
 It was their first album after original member Roger Hodgson left the band, leaving Rick Davies to handle the songwriting and singing on his own.
 The album features the group's Top 30 hit "Cannonball".
Diabolical Masquerade was a Swedish one-man black metal band with progressive influences.
 The band was formed in 1993 in Stockholm as side project of Anders Nyström (aka Blakkheim), known for his work as the guitarist of Katatonia.
"Cannonball" is the opening track from Supertramp's 1985 album "Brother Where You Bound".
 It was written and sung by keyboardist Rick Davies entirely in the chord of G minor.
 Davies stated in an interview "I did it simply to see if it could be done".