Question: What is the best known role of the host of the 64th Annual Tony Awards ? 

Context paragraphs:
60th Tony Awards: The 60th Annual Tony Awards were held at Radio City Music Hall on June 11, 2006.  The award ceremony was broadcast live on the CBS television network in the United States.  The 2006 Tony Awards did not feature a host, but instead over 60 stars presented awards at the ceremony.

68th Tony Awards: The 68th Annual Tony Awards were held June 8, 2014, to recognize achievement in Broadway productions during the 2013–14 season.  The ceremony was held at Radio City Music Hall in New York City, and was televised live on CBS.  Hugh Jackman was the host, his fourth time hosting.  The 15 musical Tony Awards went to seven different musicals, and six plays shared the 11 play Tony Awards.

64th Tony Awards: The 64th Annual Tony Awards took place on Sunday, June 13, 2010, held again at Radio City Music Hall in New York City.  The host was Sean Hayes.  These awards recognize Broadway productions during the 2009–2010 season.  The cut off-date for Tony eligibility was April 29, 2010, and the nominations were announced on May 4.

70th Tony Awards: The 70th Annual Tony Awards were held on June 12, 2016, to recognize achievement in Broadway productions during the 2015–16 season.  The ceremony temporarily returned to the Beacon Theatre in New York City after three years at Radio City Music Hall and was broadcast live by CBS.  James Corden served as host.  The 70th Tony Awards won the Emmy Award for Outstanding Special Class Program.

Sean Hayes (actor): Sean Patrick Hayes (born June 26, 1970) is an American actor, comedian, and producer.  He is best known for his role as Jack McFarland on the NBC sitcom "Will & Grace", for which he won an Emmy Award, four SAG Awards, and one American Comedy Award, and earned six Golden Globe nominations.  He also runs a television production company called Hazy Mills Productions, which produces shows such as "Grimm", "Hot in Cleveland", "The Soul Man", and "Hollywood Game Night".

36th Tony Awards: The 36th Annual Tony Awards was broadcast by CBS television on June 6, 1982, from the Imperial Theatre.  The host was Tony Randall.

6th Tony Awards: The 6th Annual Tony Awards, presented by the American Theatre Wing, took place at the Waldorf-Astoria Grand Ballroom, on March 30, 1952.  It was broadcast on radio station WOR and the Mutual Network.  The Antoinette Perry Awards for Excellence in Theatre, more commonly known as the Tony Awards, recognize achievement in Broadway theatre.

67th Tony Awards: The 67th Annual Tony Awards were held June 9, 2013, to recognize achievement in Broadway productions during the 2012–13 season.  The ceremony returned to Radio City Music Hall in New York City, after two years at Beacon Theatre, and was broadcast live on CBS television.  Neil Patrick Harris hosted for the third consecutive year, his fourth time as host.  Awards in four of the eight acting categories, (Best Actress in a Play, Best Actor in a Musical, Best Actress in a Musical, Best Featured Actor in a Play) were given to African-American performers.  Furthermore, it is the second time in Tony history that both directing prizes went to women.  Garry Hynes and Julie Taymor had previously won in 1998. " Kinky Boots" had a season best 13 nominations and 6 awards.  Cyndi Lauper, who wrote the score for "Kinky Boots", is the first solo female winner for Best Original Score.

7th Tony Awards: The 7th Annual Tony Awards, presented by the American Theatre Wing, took place at the Waldorf-Astoria Starlight Ballroom, on March 29, 1953.  The Antoinette Perry Awards for Excellence in Theatre, more commonly known as the Tony Awards, recognize achievement in Broadway theatre.  The event was broadcast on radio by the National Broadcasting Company.  The presenter was Faye Emerson.  Music was by Meyer Davis and his Orchestra.

20th Tony Awards: The 20th Annual Tony Awards was broadcast on June 16, 1966, from the Rainbow Room at Rockefeller Center on Radio Station WCBS.  This was the first afternoon Tony Awards ceremony.  The Masters of Ceremonies were George Abbott and Ginger Rogers.  The ceremony was sponsored by the League of New York Theatres in conjunction with the American Theatre Wing, which had previously solely arranged the ceremony.

Supporting paragraphs: 64th Tony Awards Sean Hayes (actor)
Answer: Jack McFarland