To which actor, was the man who starred with Ben Kingsley and Sherry Baines in Testimony, regarded as the natural successor ?
Testimony (1988 film): Testimony: The Story of Shostakovich is a 1988 British musical drama film directed by Tony Palmer and starring Ben Kingsley, Sherry Baines and Robert Stephens. Robert Stephens:  He was one of the most respected actors of his generation and was at one time regarded as the natural successor to Laurence Olivier.
Laurence Olivier.