Question: \Which musician was a member of Genesis, Ray Wilson or Thomas Erak?

Context paragraphs:
Genesis discography: The following is the discography of the band Genesis.  Genesis are a British progressive rock band comprising Phil Collins, Mike Rutherford and Tony Banks "(with touring members Chester Thompson and Daryl Stuermer)" and previously including Peter Gabriel, Steve Hackett, Anthony Phillips, John Mayhew and Ray Wilson, in various periods of their history.  Genesis' first album, "From Genesis to Revelation", was released in March 1969 and reached its international peak of #170 on the United States' "Billboard" 200 albums chart.  Over the next five years, Genesis released albums in the second half of every year, including two in 1973, as one was a live album.  Over this period, the group's fame rose, as did their charting positions.  Over time, the group has broken up, changed lineups and taken both short and extended hiatuses.

Ray Wilson Live: Ray Wilson Live is a live album from Ray Wilson.  It was released in February 2005.

Dick Bros Record Company: The Dick Brothers Record Company (1993 to 1998) was an independent record label formed by the singer Fish based in Haddington, East Lothian, Scotland.  It predominantly released material by Fish, including 'official bootleg' live albums.  Although they were plans to include other artists, only two full non-Fish albums ever appeared on the label: "In Amber" by Dream Disciples (1994) and "Man Dancin" by Tam White (1996).  In addition, the first Dick Bros. ever released was a compilation showcasing artists that had recorded at the studio "Funny Farm Residential Recording Studios" that Fish was running at the time.  Entitled "The Funny Farm Project - Outpatients '93", it was intended as the start of a regular series, but only one was ever published.  Apart from two cover versions and one original unreleased song by Fish, it included two tracks by Dream Disciples, two by Joyriders and one each by One Eternal, Avalon and Guaranteed Pure.  The latter were notable due to their singer Ray Wilson who went on to become a member of Stiltskin and Genesis.

Illuminaudio: Illuminaudio is the third studio album by American post-hardcore band Chiodos.  It was released on October 5, 2010 through Equal Vision Records.  "Illuminaudio" is the first and only studio album from the band with vocalist Brandon Bolmer, formerly of Yesterdays Rising, after the departure of Craig Owens.  Owens would return to the band in 2012, replacing Bolmer.  This is also the first and only album with drummer Tanner Wayne, formerly of Underminded.  He would leave the band in 2012, to be replaced by former drummer Derrick Frost.  This is also the last album with original guitarist Jason Hale.  He would leave the band in 2012 to be replaced by The Fall of Troy's guitarist and vocalist Thomas Erak.  As of March 2014, the album has sold 49,000 copies in the United States.

Thomas Erak: Thomas Erak is an American musician from Mukilteo, Washington, best known as a founding member of the Seattle-based progressive post-hardcore band, The Fall of Troy and as a former member of the band Chiodos.

Congo (song): "Congo" was the first single from the Genesis album "Calling All Stations", released in September 1997.  The single marked the debut of Ray Wilson as the lead vocalist for the band.  It was a hit across Europe.

An Audience and Ray Wilson: An Audience and Ray Wilson is a live acoustic album by Ray Wilson released in 2006 prior to his reforming of Stiltskin.  The recording comes from a live performance given by Ray Wilson on 18 May 2003 in the Agnieszka Osiecka studio of Polish Radio in Warsaw.  According to the information on the sleeve, Ray Wilson "regards this performance as the best solo concert he has done to date.  The concert is a fusion of stories, humour and music and is enjoyed by a very attentive and respectful Polish audience."  The CD was made available exclusively through his website.

She (Stiltskin album): She is the second album by the band Stiltskin now led by Ray Wilson.  The project is sometimes known as Ray Wilson & Stiltskin.  The music is a fusion of diverse influences including Daft Punk, Phil Lynott, Audioslave, Metallica, David Bowie and Radiohead.

Ray Wilson (musician): Raymond Wilson (born 8 September 1968) is a Scottish musician, best known as vocalist in the post-grunge band Stiltskin, and in Genesis from 1996 to 1998.

The Fall of Troy: The Fall of Troy is an American post-hardcore band from Mukilteo, Washington.  The band is a trio consisting of Thomas Erak (guitars, vocals, keyboards), Andrew Forsman (drums, percussion) and Tim Ward (bass, screamed vocals) who was later replaced by Frank Ene following his departure from the band in late 2007.  Ene would remain in the band until their initial break-up in 2010, but Ward rejoined the band in Ene's place for their reunion in 2013.  Drew Pelisek, formerly of CHON, has been touring with the band on bass and backing vocals since 2017 and both he and Ward are considered to be official members

Supporting paragraphs: Ray Wilson (musician) Thomas Erak
Answer: Raymond Wilson