Question: Who is best known as the singer/guitarist for the punk rock band Rancid and hip hop/punk rock supergroup the Transplants, Jacoby Shaddix or Tim Armstrong ?

full_context: Document 1: Stephen Pearcy: Stephen Eric Pearcy (born July 3, 1956), known as Stephen Pearcy, is an American musician. He is best known as the founder, singer, and songwriter of the heavy metal band Ratt. He has also been in the bands Firedome, Crystal Pystal, Arcade, Vicious Delite, Vertex. He has also recorded four records as a solo artist.
Document 2: Papa Roach: Papa Roach is an American rock band from Vacaville, California. Formed in 1993, their first major-label release was the triple-platinum album "Infest" (2000). The group's success continued with their gold album "Lovehatetragedy" (2002), their platinum album "Getting Away with Murder" (2004), "The Paramour Sessions" (2006), "Metamorphosis" (2009), "Time for Annihilation" (2010), "The Connection" (2012), and "F.E.A.R." (2015). Papa Roach has sold more than 20 million album copies worldwide and are known for their songs "Last Resort", "Between Angels and Insects", "She Loves Me Not", "Getting Away with Murder", "Scars", "Forever", "Lifeline", and "Face Everything and Rise". Their ninth studio album, "Crooked Teeth", was released on May 19, 2017. The first single from the album, "Help", topped the "Billboard" Mainstream Rock Songs chart in April 2017.
Document 3: Rancid (band): Rancid is an American punk rock band formed in Berkeley, California in 1991. Founded by 1980s punk veterans Tim Armstrong and Matt Freeman, who previously played in the highly influential ska punk band Operation Ivy, Rancid is often credited (along with Green Day and The Offspring) for reviving mainstream interest in punk rock in the United States and bringing punk rock into the mainstream during the mid-1990s. Over their 26 -year career, Rancid remained signed to an independent record label and retained much of its original fan-base, most of which was connected to its underground roots.
Document 4: Rancid (2000 album): Rancid (also known as Rancid 5 or Rancid 2000) is the eponymously titled fifth studio album by the American punk rock band Rancid. It is the second eponymous album and was released on August 1, 2000, through frontman Tim Armstrong's label, Hellcat Records. It was the band's first album released through Hellcat. It is Rancid's most hardcore offering to date, which was released as a follow-up to the more ska and reggae oriented "Life Won't Wait". It spans 22 tracks in under 40 minutes, resulting in over 3/4 of the songs clocking at under 2 minutes. The Japanese version includes one bonus track, "Sick Sick World". Songs on the album make reference to famous gangster Al Capone, as well as Norse God Loki, John Brown, Ulysses S. Grant, Nelson Mandela, Charles Van Doren, Geoffrey Chaucer's "Canterbury Tales" and Don Giovanni. Brett Gurewitz (Bad Religion) reunited with Rancid and became their producer for this album. It was 6 years since he co-produced the band's second album "Let's Go" (1994), although he engineered the band's third album, "...And Out Come the Wolves" (1995). Rancid and Gurewitz would continue their collaboration for their next three albums, "Indestructible", "Let the Dominoes Fall" and "Honor Is All We Know".
Document 5: Billie Joe Armstrong: Billie Joe Armstrong (born February 17, 1972) is an American musician, singer, songwriter and actor who is best known as the lead vocalist, primary songwriter, and guitarist of the punk rock band Green Day, which he co-founded with Mike Dirnt. He is also a guitarist and vocalist for the punk rock band Pinhead Gunpowder and provides lead vocals for Green Day's side projects Foxboro Hot Tubs and The Network.
Document 6: Jacoby Shaddix: Jacoby Dakota Shaddix (born July 28, 1976) is an American musician, singer-songwriter, sporadic actor and former television presenter. He is best known as being the founding member and the continuous lead singer of the California-based rock band Papa Roach since the band's formation in 1993.
Document 7: Jaret Reddick: Jaret Ray Reddick (born March 6, 1972) is an American musician, singer, songwriter, composer, podcaster, actor and voice actor, best known as the lead vocalist, rhythm guitarist, and primary songwriter for the rock band Bowling for Soup. He plays a Music Man Axis that has a flag of Texas design on it.
Document 8: Corey Taylor: Corey Todd Taylor (born December 8, 1973) is an American musician, singer, songwriter, actor, and author, best known as the lead singer and lyricist of the American heavy metal band Slipknot and the American alternative metal band Stone Sour.
Document 9: Fight the Sky: Fight the Sky was a post-hardcore band from Sacramento, California, best known for being the heavier side-project of Papa Roach lead singer Jacoby Shaddix.
Document 10: Epitaph Records: Epitaph Records is a Hollywood-based independent record label owned by Bad Religion guitarist Brett Gurewitz. The label was originally "just a logo and a P.O. box" created in the 1980s for the purpose of selling Bad Religion records, but has evolved into a large independent record label. Gurewitz took the name from a King Crimson song of the same name. Throughout the 1980s and 1990s most of the bands on Epitaph were punk and pop punk groups, while there are many post-hardcore and bands signed to the label as well. A large portion of the record label, known as Hellcat Records, is owned by Tim Armstrong, frontman of the punk rock band Rancid. Several sister-labels also exist, such as ANTI-, Burning Heart Records, Fat Possum Records, Hellcat Records and Heart & Skull Records that have signed other types of bands. The label has recently been added to the Forza Horizon franchise as a radio station.
Document 11: Tim Armstrong: Timothy Ross “Tim” Armstrong (born on November 25, 1965) is an American musician, singer, songwriter, producer, and actor. He is best known as the singer/guitarist for the punk rock band Rancid and hip hop/punk rock supergroup the Transplants. Prior to forming Rancid, Armstrong was in the influential ska punk band Operation Ivy. In 1997, along with Brett Gurewitz of the band Bad Religion and owner of Epitaph Records, Armstrong founded Hellcat Records. In 2012, through his website, Armstrong started releasing music that influenced him, along with stripped-down cover songs of his own work under the name Tim Timebomb. He has released at least one song per week since late 2012. Armstrong is also a songwriter for other artists. Armstrong won a Grammy Award for his work with Jimmy Cliff and Pink and he has also worked with Joe Walsh.
Document 12: Tim Timebomb: Tim Timebomb is a music project by Tim Armstrong, best known as a member of the punk rock band Rancid. Armstrong has recorded a large number of songs – a mixture of cover versions, including Rancid covers, and original songs, including some tracks from his musical film project "RocknNRoll Theater" – with a variety of supporting musicians.
Document 13: Tim McIlrath: Timothy James "Tim" McIlrath (born November 3, 1978) is an American punk rock musician. He is the lead singer, rhythm guitarist, songwriter and co-founder of the American punk rock band Rise Against. McIlrath is known to support animal rights and actively promotes PETA with his band. He is also straight edge.
Document 14: Ronnie Radke: Ronald Joseph Radke (born December 15, 1983) is an American singer, songwriter, entertainer, and record producer born in Las Vegas, Nevada. He is the founding member and current lead vocalist, keyboardist, and recently guitarist for the rock band Falling in Reverse, and is the former vocalist and founding member of post-hardcore band Escape the Fate.
Document 15: Transplants (band): Transplants are an American punk rock/rap rock supergroup. They formed in 1999 when Tim Armstrong (of the bands Rancid and Operation Ivy) played his friend and roadie Rob Aston some beats he had made using Pro Tools and asked Aston if he would consider contributing lyrics. Initially, Armstrong played all the instruments himself but as the project grew, he invited musician friends such as Matt Freeman (Rancid), Lars Frederiksen (Rancid), and Vic Ruggiero (The Slackers) to add to the sound. Before long, Armstrong and Aston decided to officially form a band, but to make things complete, they wanted a drummer, so Travis Barker from Blink-182 was asked to join in 2002.
ground_truth: Timothy Ross “Tim” Armstrong