Question: Between Trent Reznor and Ali Campbell, who has a more diverse career?

Documents:
source: Trent Reznor
text: Trent Reznor Michael Trent Reznor (born May 17, 1965) is an American singer, songwriter, musician, record producer, and film score composer.

source: Ali Campbell
text: Ali Campbell Alistair Ian "Ali" Campbell (born 15 February 1959) is an English singer and songwriter who was the lead singer and a founding member of the English reggae band UB40. As part of UB40, Campbell sold over 70 million records worldwide and toured the globe for 30 years. In 2008, Campbell left UB40 and embarked on a solo career. In 2012, Campbell was announced as one of the three judges on the judging panel of the TV show, "New Zealand's Got Talent". In August 2014, Campbell announced that he had reunited with former UB40 band mates Astro and Mikey to record a new album, "Silhouette", released on 6 October 2014.

source: List of Nine Inch Nails band members
text: List of Nine Inch Nails band members Nine Inch Nails is an American industrial rock band, founded in 1988 by Trent Reznor in Cleveland, Ohio. Nine Inch Nails live performances contrast with its in-studio counterpart: although Reznor is in complete creative control of Nine Inch Nails in-studio, he typically assembles groups of backing musicians to interpret songs for tours and other live performances. In 2009 Reznor announced that Nine Inch Nails was done touring, but that he would continue to create music under the name. In 2013 Reznor announced that Nine Inch Nails would return to the stage and revealed tour dates for the Twenty Thirteen Tour.

source: Atticus Ross
text: Atticus Ross Atticus Matthew Cowper Ross (born 16 January 1968) is an English musician, songwriter, record producer, and audio engineer. Along with Trent Reznor, Ross won the Academy Award for Best Original Score for "The Social Network" in 2010. In 2013, the pair won a Grammy Award for Best Score Soundtrack for Visual Media for their soundtrack to "The Girl with the Dragon Tattoo". In 2016, Ross became an official member of Reznor's band Nine Inch Nails.

source: 12 Rounds
text: 12 Rounds 12 Rounds is a British rock band formed by Atticus Ross and singer Claudia Sarne, who are married. After the release of their first album, "Jitter Juice", they toured with the Sneaker Pimps. 12 Rounds played the Reading Festival in 1996. Their song "Something's Burning" was featured on the soundtrack to the 1997 film "All Over Me", and "Just Another Day," their collaboration with Pale 3, was featured on the soundtrack to the 2000 film "The Princess and the Warrior". The group released a few projects under various record labels before releasing "My Big Hero" under Trent Reznor's Nothing Records. They were the opening act on Marilyn Manson's "Mechanical Animals" promo tour that ranged from September to December 1998. A follow-up album was recorded with Reznor as producer; it remains unreleased. Ross has nonetheless worked with Reznor on every Nine Inch Nails album since "With Teeth" as well as other projects.

source: Year Zero (game)
text: Year Zero (game) Year Zero is an alternate reality game (ARG) based on the Nine Inch Nails concept album of the same name, its expected follow-up, and a possible accompanying film or television project. Although the album was released on April 16, 2007 in Europe, and the following day worldwide, the game had been underway since roughly February 12, 2007 and was expected to continue for approximately eighteen months. The game was created by 42 Entertainment, the same group responsible for the "Halo 2" promotional alternative reality game "I Love Bees". Trent Reznor, frontman and sole member of the band, has called the game "a new entertainment form". In response to criticism regarding the promotion of the album, Reznor stated:

source: Piggy (song)
text: Piggy (song) "Piggy" is a song by American industrial rock band Nine Inch Nails from their second studio album, "The Downward Spiral" (1994). It was written by Trent Reznor, co-produced by Flood, and recorded at Le Pig (10050 Cielo Drive). It was released in December 1994 as a promotional single from the album. The song is known for being Reznor's only live drumming performance.

source: Natural Born Killers (soundtrack)
text: Natural Born Killers (soundtrack) Natural Born Killers: A Soundtrack for an Oliver Stone Film is the soundtrack to the film "Natural Born Killers", produced by Trent Reznor of Nine Inch Nails. Reznor reportedly produced the soundtrack using a portable Pro Tools in his hotel room while on tour. On his approach to compiling the soundtrack, Reznor told MTV:

source: The Girl with the Dragon Tattoo (soundtrack)
text: The Girl with the Dragon Tattoo (soundtrack) The Girl with the Dragon Tattoo is an ambient soundtrack by Trent Reznor (of Nine Inch Nails) and Atticus Ross, for David Fincher's film of the same name. It was released on December 9, 2011. This is the second soundtrack that Reznor and Ross have worked on together, the previous being the Oscar-winning "The Social Network", also for Fincher. The album was released on Mute Records outside North America.

source: Remix 2014 EP
text: Remix 2014 EP Remix 2014 EP is a remix extended play (EP) by American industrial rock band by Nine Inch Nails. It was released on January 21, 2014 exclusively on Beats Music, a streaming service project led by Trent Reznor and Dr. Dre. Trent Reznor acts as the chief creative officer of the website.

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Answer: Trent Reznor