Question: Which British theatrical producer that appeared on the BBC's The Sound of Musicals, was considered  "the most successful, influential and powerful theatrical producer in the world" by the "New York Times?
Sentence (from "Cameron Mackintosh"): At the height of his success in 1990, he was described as being "the most successful, influential and powerful theatrical producer in the world" by the "New York Times".
Relevant evidence: Yes