Mstislav Rostropovich, Daniil Shafran and Sviatoslav Knushevitsky were leading examples of what kind of musician among 20th century Russians?
Sviatoslav Knushevitsky:  After Mstislav Rostropovich and Daniil Shafran, he is spoken of as one of the pre-eminent Russian cellists of the 20th century. Daniil Shafran: Daniil Borisovich Shafran (Russian: Даниил Борисович Шафран , January 13, 1923February 7, 1997) was a Soviet Russian cellist.
cellist