Question: Andor Toth was the founding concertmaster of the Los Angeles Chamber Orchestra under which English violinist that was considered "one of the world's greatest conducters"?

Sir Neville Marriner, {'1': ", '2': ", '3': ", '4': "} (15 April 1924 – 2 October 2016) was an English violinist who became "one of the world's greatest conductors".  He founded the Academy of St Martin in the Fields, and his partnership with them is the most recorded of any orchestra and conductor. <SEP> The Concerto for Viola and Orchestra is a viola concerto by the American composer John Harbison.  The work was commissioned by the Saint Paul Chamber Orchestra, the Los Angeles Chamber Orchestra, and the New Jersey Symphony Orchestra with contributions from Meet The Composer and "Reader's Digest".  It was first performed by Jaime Laredo and the New Jersey Symphony Orchestra under the direction of Hugh Wolff on May 18, 1990. <SEP> The Hollywood Chamber Orchestra (HCO) is an American orchestra based in Los Angeles, California, and founded in 2015 by musicians Noah Gladstone and Mark Robertson, who are also co-music directors.  Its first public performance was on August 8, 2015, at the Colburn School's Zipper Hall.  The program consisted of all horn concertos and was presented by the 2015 International Horn Society.  Included on the program was the world premiere of Brad Warnaar's horn concerto, conducted by the composer and performed by Andrew Bain, the principal horn player of the Los Angeles Philharmonic.  Their first public ticketed concert occurred on December 11, 2015, at the Montalban Theater in Hollywood, featuring Vivaldi's Four Seasons, performed by Los Angeles Philharmonic concertmaster Martin Chalifour.  Other soloists appearing over the last 12 months have included violinist Sarah Chang, pianist Molly Morkoski, clarinetist Eddie Daniels, and singers Cindy O'Connor, Tyler Duncan, Eleni Matos, Garth Neustadter, Franchesca Retford, and Holly Sedillos.  Subsequent concerts have included Star Trek:The Ultimate Voyage Tour at the Pantages Theatre, conducted by Justin Freer; and the world premiere of the concert version of the documentary film Blackfish at the Montalban Theater, conducted by composer Jeff Beal.  On July 24, 2016, the HCO commissioned and premiered seven new works by composers Michael Barry, Chad Cannon, Andy Forsberg, John Kaefer, Brian Langsbard, Susie Benchasil Seiter, and Andrew Morgan Smith. <SEP>  In 1969, he was the founding concertmaster of the Los Angeles Chamber Orchestra under Neville Marriner. Andor John Toth (June 16, 1925 – November 28, 2006) was an American classical violinist, conductor and educator with a musical career spanning over six decades.  Toth played his violin on the World War II battlefields of Aachen, Germany; performed with the NBC Symphony Orchestra under Arturo Toscanini in 1943 at age 18; and formed several chamber music ensembles, including the Oberlin String Quartet, the New Hungarian Quartet, and the Stanford String Quartet.  For 15 years he was the violinist in the Alma Trio.  Toth conducted orchestras in Cleveland, Denver and Houston.  Toth taught at five important colleges and universities, and recorded for Vox, Decca Records and Eclectra Records.