William Sylvester played the role of Dr. Heywood Floyd, Chairman of the National Council of Astronautics in 2001. This significantly more famous actor played the role of Heywood Floyd in the sequel, 2010. Identify this actor who was twice nominated for Oscars: once in a supporting role as Sonny Grosso in The French Connection and once for his leading role as Joe Gideon in All That Jazz, though he will probably best be remembered for advising Quint, in his role of Chief Brody, of the need for a bigger boat.
Roy Scheider