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"?

Context articles: Viola Concerto (Harbison)
Neville Marriner
Los Angeles Chamber Orchestra
Norman Pearson (musician)
Zipper Hall
Los Angeles Children's Chorus
Andor Toth
Mark Anchor Albert
Armen Anassian
Hollywood Chamber Orchestra

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.
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.
The Los Angeles Chamber Orchestra (LACO) is a 40-member American chamber orchestra based in Los Angeles, California, considered by music critic Jim Svejda as "America's finest chamber orchestra".
 Jeffrey Kahane is the Music Director.
Norman Pearson is an American orchestral tuba player who is most known as the tubist with the Los Angeles Philharmonic Orchestra since 1993.
 Prior to his appointment with the Los Angeles Philharmonic Norman Pearson was a freelance musician in the Los Angeles area and performed regularly with the Pacific Symphony, Joffrey Ballet, Los Angeles Music Center Opera and the Los Angeles Chamber Orchestra.
 He attended the University of Southern California, studying under Tommy Johnson, where he received a bachelor's degree in music.
 He also has recorded for most of the major Hollywood motion picture and television studios.
 He currently teaches at the Colburn School and the University of Southern California.
Herbert Zipper Concert Hall is a 415-seat music venue located on the campus of the Colburn School in Los Angeles, California, United States.
 In addition to serving as a performance space for the school, it also is home to Monday Evening Concerts, Southwest Chamber Music, Piano Spheres, VOX Femina Los Angeles, and Musica Angelica.
 The Los Angeles Chamber Orchestra performs part of its season there.
 It also regularly hosts many other distinguished performers, and has served as a venue for the Los Angeles Philharmonic's Chamber Music Society and "Green Umbrella" New Music Group series.
Los Angeles Children’s Chorus (LACC) is a children's choral youth organisation based in Los Angeles.
 LACC has appeared in more than 300 performances with such organizations as the Los Angeles Opera, Los Angeles Philharmonic, Los Angeles Master Chorale, Hollywood Bowl Orchestra, Los Angeles Chamber Orchestra.
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.
 In 1969, he was the founding concertmaster of the Los Angeles Chamber Orchestra under Neville Marriner.
 Toth taught at five important colleges and universities, and recorded for Vox, Decca Records and Eclectra Records.
Mark Anchor Albert, (born March 13, 1961) is a Los Angeles attorney, philanthropist, impresario and lay Catholic leader.
 He has played an integral lead role in several landmark legal cases in addition to founding support organizations for various Los Angeles area civic and cultural institutions, including the Los Angeles Opera and Los Angeles Chamber Orchestra.
 He is the founder of the Queen of Angels Foundation, which in 2011 successfully revived the tradition of an annual procession in honor of Our Lady of the Angels in downtown Los Angeles.
Armen Anassian holds Master's Degrees in Instrumental Conducting and Violin Performance, and studied in the United States, Armenia, and Germany.
 His teachers include Rainer Kussmaul, Sidney Weiss, Dorothy DeLay, and conductor Michael Zearott.
 Mr. Anassian has held Conducting and/or Concertmaster positions with such noted groups as the Hoboken Chamber Orchestra, Freiburg Chamber Orchestra, Heidelberg Chamber Orchestra and the Zelt Musik Festival Orchestra.
 In Los Angeles he has been Concertmaster/Guest Concertmaster with Pacific Symphony, Santa Barbara Symphony, California Philharmonic, Pasadena Pops, Burbank Symphony, Riverside Philharmonic, Inland Empire Symphony, Long Beach Symphony, Glendale Symphony, Symphony in the Glen and the Los Angeles Opera.
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.