Question: Who is  an American musician, singer and songwriter best known as one of the guitarists and co-founder of the nu metal band Korn and his solo project Love and Death,  Brian Welch or Ville Valo?

Context paragraphs:
Brian Welch: Brian Philip Welch (born June 19, 1970), better known by the stage name Head, is an American musician, singer and songwriter best known as one of the guitarists and co-founder of the nu metal band Korn and his solo project Love and Death.  Along with fellow Korn guitarist James "Munky" Shaffer, Welch helped develop Korn's distinctive sound, a mix of sirenlike shards of dissonant guitar that mimicked a turntablist's various effects and rumbling down-tuned riffing, that defined the nu metal aesthetic beginning in the mid-'90s.

Ville Valo: Ville Hermanni Valo (born 22 November 1976) is a Finnish singer-songwriter and multi-instrumentalist, best known as the lead vocalist and main songwriter of the Finnish gothic rock band HIM.  Influenced by the likes of Black Sabbath and Type O Negative, Valo began his career playing bass and drums in various bands around Helsinki, before forming HIM in 1991.  The band would go on to become one of the most commercially successful Finnish bands of all time, and the first to receive a gold record in the United States.  Valo is also credited as the creator of the heartagram, the trademarked symbol of HIM.

Take a Look in the Mirror: Take a Look in the Mirror is the sixth studio album by American nu metal band Korn, and is the last studio album to feature their full original lineup, as Brian "Head" Welch departed the band soon afterwards until his return in 2013.  It was also the last studio album by Korn under the Epic and Immortal labels.

List of Korn band members: Korn is a nu metal band from Bakersfield, California, formed in 1993 by James Shaffer, Reginald Arvizu, David Silveria, Brian Welch, and Jonathan Davis.  With the exception of a brief departure of Silveria due to a wrist injury, the band had always performed and recorded with its original five members.  After the departure of guitarist Welch, the band formed a backup band to replace Welch's guitar playing and later Silveria's drumming after his departure in 2006.  The band has also brought in other instruments that previously had not been used by the band such as keyboards and various percussion instruments and backing vocalists. Currently, the only original member not part of the current lineup of the band is Silveria.

Wesley Geer: Wesley "Wes" Geer born Wesley Harmon Geer, Jr. is an American guitar player, songwriter and producer, best known as the former touring guitar player of the nu metal band Korn He replaced former Korn touring guitar player Shane Gibson in 2009 and played with the band until Brian "Head" Welch's return to the band in 2013.  Also known as "Wesstyle" he is a founding member of the band Hed PE, formed in 1994 in Huntington Beach, CA.  Geer was a guitarist, songwriter and producer in the band until his departure in 2003.

Roots (Sepultura album): Roots is the sixth studio album by Brazilian heavy metal band Sepultura.  It was released in Europe on  20, 1996 (1996--) and in the U.S. three weeks later on March 12 by Roadrunner Records.  It is the band's last studio album to feature founding member and vocalist/rhythm guitarist Max Cavalera.  Following the shift to slower tempos and Latin-tinged rhythms on the album "Chaos A.D.", "Roots" delves even further into Brazilian musical textures and features significant contributions from Brazilian musician Carlinhos Brown, who guided and arranged the sections throughout the album that feature ensemble percussion playing.  The song "Lookaway" also features guest appearances by Korn vocalist Jonathan Davis, former Korn drummer David Silveria, former Limp Bizkit turntablist DJ Lethal, and Faith No More/Mr. Bungle/Tomahawk/Fantômas vocalist Mike Patton.  The album draws influence from the then-surging nu metal movement, specifically Korn (whose first two albums were also produced by Ross Robinson) and Deftones.  (After leaving the band, Max Cavalera would continue to pursue the nu metal and "world" stylings of "Roots" with his solo project Soulfly.)  Since its release, "Roots" has sold over 2 million copies worldwide.

Never Never (Korn song): "Never Never" is a song written and recorded by American nu metal band Korn.  It was released as the lead single from Korn's eleventh studio album, "The Paradigm Shift", on August 12, 2013.  It marks the first Korn single with original co-founding guitarist Brian "Head" Welch since 2004.  The single became Korn's first number one on the Mainstream Rock Songs chart.

The Serenity of Suffering: The Serenity of Suffering is the twelfth studio album by nu metal band Korn, released on October 21, 2016.  According to guitarist Brian Welch, it is "heavier than anyone's heard us in a long time" and that it contains their most intense music in a long time vocally as well.

Jasen Rauch: Jasen Rauch ( ) (born April 24, 1981) is an American producer, composer, musician, and writer, best known as the former lead guitarist and current lead guitarist of the alternative rock bands Red and Breaking Benjamin, respectively.  Although no longer an active member of Red, he still writes music for the band.  Rauch is also well-known as the producer for Korn guitarist Brian Welch's solo project, Love and Death.  According to Welch, Rauch "has a great track record for recording, producing, writing, and being in a band", and credits him as an inspiration for his returning to music.  Before joining Breaking Benjamin in late 2014, Rauch also co-wrote several songs on their 2009 "Dear Agony" album, including "I Will Not Bow" and "Lights Out".  Rauch is also a writer for Razor & Tie Music Publishing.

Nu metal: Nu metal (also known as nü-metal and aggro-metal ) is a form of alternative metal that combines elements of heavy metal music with elements of other music genres such as hip hop, alternative rock, funk and grunge.  Nu metal bands have drawn elements and influences from a variety of musical styles, including multiple genres of heavy metal.  Nu metal rarely features guitar solos; the genre is heavily syncopated and based on guitar riffs.  Many nu metal guitarists use seven-string guitars that are down-tuned to play a heavier sound.  DJs are occasionally featured in nu metal to provide instrumentation such as sampling, turntable scratching and electronic backgrounds.  Vocal styles in nu metal include singing, rapping, screaming and growling.  Nu metal is one of the key genres of the new wave of American heavy metal.

Supporting paragraphs: Brian Welch Ville Valo
Answer: Brian Philip Welch