Question: Are Jonas Renkse and Justin Hayward both singers?

Context articles: Visions of Paradise
Songwriter (Justin Hayward album)
Never Comes the Day
Discouraged Ones
Grey Dawn (album)
Justin Hayward
Katatonia
Jonas Renkse
Paradise Lost (band)
The Actor (The Moody Blues song)

"Visions of Paradise" is a 1968 song by the progressive rock band The Moody Blues.
 First released on their album "In Search of the Lost Chord", it was written jointly by band members Justin Hayward and Ray Thomas, and was the first of many collaborations between them.
 The song is primarily led by Justin Hayward's voice and Ray Thomas's flute, with the lyrics describing the writer's perception of paradise.
Songwriter is an album by Justin Hayward released in February 1977.
 Hayward wrote all of the songs and played all of the instruments on the songs "Raised On Love" and "Nostradamus."
 The album also features musicians Hayward had worked with on his previous project, "Blue Jays" recorded with John Lodge.
 These included Jim Cockey on violin, Tom Tompkins on viola, and Tim Tompkins on cello, all members of the band Providence, and Mel Galley on bass, Terry Rowley on guitars, and Dave Holland on drums, all members of the band Trapeze.
 Ken Freeman played the keyboards.
 According to the LP liner notes, Hayward's daughter Doremi (born December 1972) sang on "Raised on Love."
"Never Comes the Day" is a 1969 single by the progressive rock band The Moody Blues.
 It was written by band member Justin Hayward, and was the only single released from their 1969 album "On the Threshold of a Dream".
 The song was edited from the album version of 4:43 down to 2:42.
 The single edit omits the second verse and simply goes into the longer chorus after the first verse.
 A similar edit was done on the Justin Hayward/John Lodge (Blue Jays) song "I Dreamed Last Night", but that version ends cold.
 Despite the fact that the album was a number-one hit in the UK, "Never Comes the Day" was a commercial flop as a single, and did not chart in the UK.
 The single also included Mike Pinder's "So Deep Within You," another track from the same album, on the B-side.
Discouraged Ones (stylized discøuraged ønes) is the third full-length album by Katatonia.
 The album was released on April 27, 1998.
 This is the last Katatonia release with Mikael Oretoft.
 It is also their last release with Jonas Renkse on drums; on future releases, he would focus on being the band's lead vocalist and contributing additional guitar work.
 According to Renkse, "Discouraged Ones" had sold roughly 20,000 copies as of 2001.
Grey Dawn was the second full release of death/doom metal band October Tide.
 This is the only October Tide release with Mårten Hansen in the band, and the last with Jonas Renkse.
 The album was reissued on 23 November 1999.
Justin David Hayward (born 14 October 1946) is an English musician, best known as songwriter, lead singer, and guitarist in the rock band the Moody Blues.
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.
Jonas Petter Renkse (born 19 May 1975) is a founding member, songwriter, lead vocalist (1991–1994, 1997-) and ex-drummer (1991–1994, 1996–1998) of the band Katatonia, founding member, songwriter, bassist, backing vocalist, ex-guitarist (2004) of the band Bloodbath.
Paradise Lost are a gothic metal band that formed in 1988 in Halifax, England and are considered by some to be one of the pioneers of the death-doom genre and of the gothic metal genre.
 Paradise Lost has proven to be an influential band, with Jonas Renkse of Katatonia saying that his band started off "as Paradise Lost fanboys".
"The Actor" is a 1968 song by the progressive rock band, The Moody Blues.
 Written by band member Justin Hayward, it was first released on their 1968 album "In Search of the Lost Chord".
 "The Actor" is one of Justin Hayward's signature love ballads.
 The song's lyrics tell the story of a young woman who falls in love with an actor.
 However, this love is unrequited, since she only sees the actor once when "The Curtain rises."
 The song prominently features Justin Hayward singing along with an acoustic guitar.
 Ray Thomas is also prominently featured playing the flute behind Hayward's voice.