Nicol Williamson never achieved the household name status of Brando or Olivier, but by many critics' appraisals, his talents equaled the greats of his own or any generation. A native of Scotland, Williamson established himself as a force of a new generation of British actors in 1964 as the star of West End production of "Inadmissable Evidence," going on to take the show to Broadway, a Tony nomination and the starring role in the 1968 film adaptation. He delivered what many regarded as the definitive "Hamlet" of his time in a U.K. restaging that went on to play Broadway. But his fortunes went offset by a reputation as an enfant terrible, earned in a series of dustups with dramatists and fellow actors. He again wowed live audiences and critics with his turns in "Macbeth," "Uncle Vanya" and "Rex" and shone in films such as "The Seven-Per-Cent Solution" (1976) and "The Human Factor" (1979), not to mention his signature turn as Merlin in the 1981 film adaptation of the Arthurian cycle, "Excalibur" (1981). He would find work in major television events, foremost ITV's 1986 Mountbatten biopic, and do two disparate Broadway and West End productions playing legendary, similarly tempestuous John Barrymore. Still, dogged by his reputation as "difficult," Williamson became an archetypal example of a talent so raw and untamable as to never truly find its widest audience.