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"?
Andor Toth:  In 1969, he was the founding concertmaster of the Los Angeles Chamber Orchestra under Neville Marriner. Neville Marriner: 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".
Neville Marriner