Question: Who is the only constant member of the band behind "Epitome of Turture"?

Context paragraphs:
Pankrti: Pankrti (The "Bastards" in Slovene) are a punk rock band from Ljubljana, Slovenia, active in the late 1970s and 1980s.  They were known for provocative and political songs.  They billed themselves as "The First Punk Band Behind The Iron Curtain" (one of their songs was titled, "Behind the iron curtain old broads pull red beet").  They are one of the most important former Yugoslav punk groups and one of the first punk rock bands ever formed in a communist country.

Behind Crimson Eyes (album): Behind Crimson Eyes is the self-titled second and final full-length studio album by Australian rock band Behind Crimson Eyes, released through Roadrunner Records on 20 March 2009.  The band has released two singles from the album, "Addicted" and "Fighting for Our Lives".

Epitome of Torture: Epitome of Torture is the fourteenth album by the German thrash metal band Sodom.

Western spinebill: The western spinebill ("Acanthorhynchus superciliosus") is a honeyeater found in the heath and woodland of south-western Australia.  Ranging between 12 – long, it weighs around 10 g .  It has a black head, gray back and wings, with a red band behind its neck and from its throat to its breast.  Its curved bill is long and slender.

Powderfinger: Powderfinger were a Queensland rock band formed in Brisbane in 1989.  From 1992 until their break-up in 2010 the line-up consisted of vocalist Bernard Fanning, guitarists Darren Middleton and Ian Haug, bass guitarist John Collins, and drummer Jon Coghill.  The group's third studio album "Internationalist" peaked at No. 1 on the ARIA Albums Chart in September 1998.  They followed with four more number-one studio albums in a row: "Odyssey Number Five" (September 2000), "Vulture Street" (July 2003), "Dream Days at the Hotel Existence" (June 2007) and "Golden Rule" (November 2009).  Their Top Ten hit singles are "My Happiness" (2000), "(Baby I've Got You) On My Mind" (2003) and "Lost and Running" (2007).  Powderfinger earned a total of eighteen ARIA Awards, making them the second-most awarded band behind Silverchair.  Ten Powderfinger albums and DVDs were certified multiple-platinum status, with "Odyssey Number Five" – their most successful album – achieving eight times platinum certification for shipment of over 560,000 units.

A Revelation for Despair: A Revelation For Despair is the debut album by Australian hard rock band Behind Crimson Eyes.  It was recorded at Sing Sing South, South Yarra and Sing Sing Richmond in Melbourne, Australia.  The lead single is "Shakedown".  The second single released from the album is "You've Had Your Chance".

Pavour Nocturnus: Pavour Nocturnus is the first EP by the Australian hard rock band Behind Crimson Eyes, released in 2005.  It is the band's debut official release, as the only thing that came before this EP was a rare demo from 2004.  Along with the demo and following EP , Pavour Nocturnus saw re-release on the compilation album Scream Out Your Name To The Night.  The words "pavour nocturnus" roughly translate to "night terrors".

Bucky Jonson: The members of Bucky Jonson are a Grammy Award winning ensemble composed of Printz Board (keyboards, trumpet, bass), George Pajon (guitars), Jr., Tim Izo (wood instruments, guitars and MPC) and Keith Harris (percussion and keyboards) with their first album, "The Band Behind The Front," released in 2007 on the BBE label.

AfterImage: AfterImage is a Filipino rock band who was active in the 1990s.  They disbanded 7 years after their formation, having released three studio albums.  After disbanding, Wency Cornejo, the band's vocalist, pursued a solo career.  AfterImage was the band behind the commercially popular songs "Habang May Buhay" ("While There's Life"), "Next in Line", and "Mangarap Ka" ("Dream").  In 2008, the band reunited and released their fourth studio album.

Sodom (band): Sodom is a German thrash metal band from Gelsenkirchen, formed in 1981.  They have gone through many line-up changes, leaving bassist/vocalist Tom Angelripper as the only constant member.  Along with Kreator, Destruction and Tankard, Sodom has been referred to as one of the "Big 4" of Teutonic thrash metal.  While three of those bands (except Tankard) created a sound that would influence death metal and black metal, Sodom's early music style would greatly influence many late 1980s and early 1990s black metal bands more than others.

Supporting paragraphs: Epitome of Torture Sodom (band)
Answer: Tom Angelripper