Question: John Stanier, is an American drummer who is currently the drummer of experimental rock band Battles, and a former member of which American alternative metal band from New York City formed in 1989?

Context paragraphs:
White Pony: White Pony is the third studio album by American alternative metal band Deftones, released on June 20, 2000 by Maverick Records.  It marked a significant growth in the band's sound and is considered a turning point for the band in terms of experimentation, employing an increasingly experimental rock sound and incorporating more new wave, dream pop, trip hop, shoegaze and post-rock influences into the alternative metal sound for which the group had become known.  Upon release and retrospectively, the album was met with overall critical acclaim and is generally regarded by fans and critics alike as one of their most mature outings.  "White Pony" is also their highest-selling album to date.  The album was certified platinum by the RIAA on July 17, 2002.  The album includes three successful singles ("Change (In the House of Flies)", "Back to School (Mini Maggit)" and "Digital Bath") as well as the 2001 Grammy Award-winning track for Best Metal Performance, "Elite".

Atlas (Battles song): "Atlas" is a song by the American experimental rock band Battles.  The song is the second track of Battles' debut album "Mirrored", and was released as the lead single on April 2, 2007.  "Atlas" received critical acclaim and was included on many critics' year-end and decade-end best songs lists.  It was included in the video games LittleBigPlanet and Major League Baseball 2K8.  The song was also used by Dodge for their advertisement of the 2013 Dodge Dart, and most recently by Quicken Loans during their Super Bowl 50 commercial for their advertisement of their "Rocket Mortgage" program.

The Mark of Cain (band): The Mark of Cain (also seen as the initialism, TMOC) are a hard rock, alternative metal band from Adelaide, South Australia.  Their style has been likened to that of Helmet and Rollins Band, yet this band pre-dates both groups and was influenced by the early work of Joy Division, Big Black and United States hardcore groups.  The Mark of Cain were formed in mid-1984 by brothers, John (guitar) and Kim Scott (bass guitar), with Rod Archer on vocals and Gavin Atkinson playing drums.  Before long, Archer had left the group and John Scott took on the lead vocal role and the group has remained a trio ever since.  The Scotts have been the core of the band which has featured 15 different drummers.  Since January 2001, former Helmet member John Stanier has been their drummer; he is also concurrently with Tomahawk and Battles.  Australian musicologist, Ian McFarlane, described the group's sound as "Gloomy, monotonous vocals and bleak slabs of metallic guitar did battle over a lurching rhythm section to arrive at a harsh sound."  Rod Archer died on 26 February 2016.

Keep the Dog: Keep the Dog was a United States-based experimental rock touring band from New York City formed in 1989 by English multi-instrumentalist, composer and improvisor Fred Frith.  The sextet was conceived as a review band for performing selections of Frith's extensive repertoire of compositions from the previous 15 years.

Battles (band): Battles is an American experimental rock group, founded in 2002 in New York City by Ian Williams (formerly of Don Caballero and Storm & Stress).  The current line-up is guitarist/ keyboardist Ian Williams, guitarist/ bassist Dave Konopka (formerly of Lynx), and drummer John Stanier (formerly of Helmet).  Former members include composer/vocalist Tyondai Braxton.

Helmet (band): Helmet is an American alternative metal band from New York City formed in 1989.  Founded by vocalist and lead guitarist Page Hamilton, Helmet has had numerous lineup changes, and Hamilton has been the only constant member.

Angel Bartolotta: Andrew "Angel" Bartolotta (born November 26, 1981) is an American drummer.  He is best known as the drummer for American alternative metal band Dope and for industrial metal band Genitorturers.  He is also the founder of the large collaborative music project Team Cybergeist.  In 2015, Angel released 2 instructional books, ""So You Want To Be A Drummer"" and ""Jurassic Drumming"".

John Stanier (drummer): John Stanier (born 2 August 1968 in Baltimore, Maryland) is an American drummer who is currently the drummer of experimental rock band Battles.  He is a former member of Helmet.

Dross Glop: Dross Glop is a remix compilation album by American experimental rock band Battles.  It was released on April 16, 2012, and compiles remixes (on one CD/in one album download) by different artists of Battles' songs from "Gloss Drop" (2011), eleven of which were originally released over a series of four 12-inch singles.  The CD (and MP3) compilation includes a remix of "Sundome" which was not included on any of the vinyl releases.

Deftones: Deftones is an American alternative metal band from Sacramento, California, U.S. Formed in 1988, the band was founded by Chino Moreno (lead vocals, rhythm guitar), Stephen Carpenter (lead guitar), Abe Cunningham (drums) and Dominic Garcia (bass).  During the group's first five years, the band's lineup changed several times, but stabilized in 1993 when Cunningham rejoined the group after his departure in 1990; by this time, Chi Cheng was the band's bassist.  The lineup remained stable for fifteen years, with the exception of keyboardist and turntablist Frank Delgado being added in 1999.  The band is known as one of the most experimental groups to have come from the alternative metal music scene.  They are sometimes dubbed "the Radiohead of metal" by critics.

Supporting paragraphs: John Stanier (drummer) Helmet (band)
Answer: Helmet