Question: Mastering engineer Dave Cooley worked with which artist whose albums were successful in South Africa?

Context paragraphs:
Bob Katz: Bob Katz is an American audio mastering engineer and author of a popular book on audio mastering.  Katz has mastered three Grammy Award-winning albums and one nominated album.  He has received acclaim from audiophiles and his book on mastering has received acclaim, with some considering it the "definitive work on mastering".  He has developed proprietary systems K-Stereo and K-Surround.  These processes are designed to "recover lost or amplify hidden ambience, space and imaging, and generate stereo from mono signals without adding artificial reverberation."

Heba Kadry: Heba Kadry is an Egyptian mastering engineer who currently resides in Brooklyn, New York.  She is best known for her work with Beach House, The Mars Volta, Neon Indian, Wooden Shjips, Lightning Bolt, White Hills, Alex G, Future Islands, Liturgy, !!! , White Lung, ...And You Will Know Us by the Trail of Dead, and The Hotelier.  Kadry worked as a staff engineer at SugarHill Recording Studios from 2005 to 2006.  She serves as Chief Mastering Engineer at Timeless Mastering in New York City.

Gene Paul: Gene William Paul (born August 20, 1944) is an American audio recording / mixing / mastering engineer, producer and musician.  He was an engineer at Atlantic Recording Studios during their famed 1960s–80s period and is currently the chief mastering engineer at G&J Audio, a mixing and mastering studio for major and independent labels focused on reissues and new recordings.  He has worked on thousands of projects, and has engineered 9 Grammy Award-winning albums with 29 total nominations in 15 different categories.  He has engineered many hit recordings, including 7 #1's on the Billboard Pop & Jazz charts, 6 more in the Pop Top 10, 10 more in the Jazz Top 10, and 5 in the R&B Top 20.

Mandy Parnell: Mandy Parnell is a British audio mastering engineer, founder and senior mastering engineer at Black Saloon Studios in London, England.  Parnell has worked on projects with a wide variety of artists including The XX, Feist, Sigur Ros, Bjork, The Knife, Frightened Rabbit, Brian Eno.

Louie Teran: Louie Teran is an American mastering engineer and educator.  He has worked on recordings for over 200 independent and major record labels artists and soundtracks, most notably, Danny Elfman, Hanz Zimmer and Thirty Seconds to Mars.  He is currently one of the mastering engineers at Marcussen Mastering, owned by Chief Mastering Engineer Stephen Marcussen, in Hollywood, California.

Denis Blackham: Denis Blackham (born 1952, Walthamstow, Essex, England) is an English music mastering engineer.  He began his audio mastering work in 1969 at IBC Studios in London, and later worked for Polygram, RCA, The Master Room, Nimbus Records, Tape One and Porky's.  In 1996 he set up his own studio at his home in Surrey England and when he moved to the Isle of Skye in 2002, he changed the name of his studio to Skye Mastering.

George Marino discography: George Marino was an American mastering engineer known for working with Guns N' Roses, Bon Jovi, Journey, Arcade Fire, Bob Dylan, Kiss, Coldplay, Mötley Crüe, Don McLean, Allman Brothers , AC/DC, Cyndi Lauper, Deep Purple, Led Zeppelin and Stevie Wonder.  Marino mastered and remastered thousands of albums in over forty years as a mastering engineer.  He started his career at Capitol Records and was there from 1967 to 1971, then became a partner in the Record Plant's Master Cutting Room from 1971 to 1973.  Marino spent the vast majority of his career mastering at Sterling Sound from 1973 until his death in 2012.

Vlado Meller: Vlado Meller is an audio mastering engineer, currently mastering at Vlado Meller Mastering in Charleston, South Carolina.  Vlado masters across multiple genres of music, with credits on rock, hip-hop, pop, jazz, metal, dance, opera, Broadway, and classical albums.  Over his 43-year career, Vlado has worked on many hit records and has worked with such artists as: Beastie Boys, Andrea Bocelli, Johnny Cash, Charlotte Church, Celine Dion, Duran Duran, Kenny G, Kenny Loggins, Julio Iglesias, Michael Jackson, Lil Wayne, Limp Bizkit, Linkin Park, Paul McCartney, Metallica, George Michael, Oasis, Pink Floyd, Public Enemy, Rage Against The Machine, Red Hot Chili Peppers, Shakira, Barbra Streisand, System Of A Down, A Tribe Called Quest, Weezer, Kanye West, Jack White, and many more.  Vlado currently holds the position of senior mastering engineer at Vlado Meller Mastering in Charleston, South Carolina.  He has won two Grammy awards.

Sixto Rodriguez: Sixto Diaz Rodriguez, known professionally as Rodriguez (born July 10, 1942), is an American singer-songwriter from Detroit, Michigan.  His career initially proved short lived in the United States, but unknown to Rodriguez his albums became extremely successful and influential in South Africa, where sales of his records outnumbered those of Elvis Presley.  Because of scarce information about Rodriguez, it was incorrectly rumored there that he had committed suicide shortly after releasing his first album.

Dave Cooley: Dave Cooley (David J. Cooley; born 1970) is an American mastering engineer in Los Angeles, California.  He has mastered and remastered records for all the major record labels and many notable independent labels.  His discography includes mastering or remastering credits for M83, Ziggy Marley, Jimmy Eat World, Fitz and the Tantrums, Freddie Gibbs, Blood Orange, J Dilla, Animal Collective, The Presets, School of VII Bells, Serge Gainsbourg, Jackson C. Frank, Isaac Hayes, Sixto Rodriguez, and the Black Angels with over 800 records credited.  He has worked on Grammy nominated or winning albums including albums for Silversun Pickups and Ziggy Marley.  Many of his credited records have achieved Gold or Platinum sales status.  His remastering work for Sixto Rodriguez appeared in the soundtrack for “Searching for Sugarman”, which was awarded an Oscar for Best Documentary Feature in 2013.

Supporting paragraphs: Dave Cooley Sixto Rodriguez
Answer: Sixto Rodriguez