Question: What fighter profiled in Facing Ali was considered to have one of the best chins in boxing history?

full_context: Document 1: Howard King (boxer): Howard King (born in Texas, United States) was an American heavyweight boxer and noted heavyweight contender during the 1950s and 60s. Best known as Howard "Honeyboy" King, he held a notable victory over George Chuvalo (which Chuvalo later avenged), and a draw against Archie Moore, regarded as the #1 Pound-for-Pound boxer of all time by Boxrec.
Document 2: Facing Ali: Facing Ali is a 2009 documentary directed by Pete McCormack about Muhammad Ali (born Cassius Marcellus Clay, Jr. in Louisville, Kentucky) as told from the perspectives of some of the notable opponents he faced during his career: George Chuvalo, Sir Henry Cooper, George Foreman, "Smokin'" Joe Frazier, Larry Holmes (a former sparring partner of Ali), Ron Lyle, Ken Norton, Earnie Shavers, Leon Spinks and Ernie Terrell.
Document 3: Ron Lyle: Ronald "Ron" Lyle (February 12, 1941 – November 26, 2011) was an American professional boxer who competed from 1971 to 1980, and in 1995. He challenged once for the undisputed world heavyweight title, losing to Muhammad Ali in 1975. Lyle was known for his punching power, crowd-pleasing fighting style, as well as courage and determination inside the ring. He held notable wins over Buster Mathis, Oscar Bonavena, Jimmy Ellis, Earnie Shavers, Joe Bugner, and Scott LeDoux, but is best known for his slugfest against George Foreman in 1976, which won Fight of the Year honors by "The Ring" magazine.
Document 4: George Chuvalo: George Louis Chuvalo, CM (born September 12, 1937) is a retired Canadian professional boxer who was a five-time Canadian heavyweight champion, and two-time world heavyweight title challenger. Chuvalo, who is considered by many to have one of the best chins in boxing history, was never knocked down in his amateur career or his 93-fight professional career and was ranked #4 on ESPN's greatest chin in boxing history list. Chuvalo lost to Hall of Fame heavyweights such as Floyd Patterson, Muhammad Ali, Joe Frazier and George Foreman, but was credited for his spirited performances. He did defeat top contenders such as Yvon Durelle, Doug Jones, Jerry Quarry and Cleveland Williams. He fought for the world title twice, losing a controversial decision to Ernie Terrell and another decision in his first fight with Ali.
Document 5: Muhammad Ali vs. Sonny Liston: The two fights between Muhammad Ali and Sonny Liston for boxing's World Heavyweight Championship were among the most anticipated, watched and controversial fights in the sport's history. "Sports Illustrated" magazine named their first meeting, the Liston–Clay fight (Ali had not yet changed his name from Cassius Clay), as the fourth greatest sports moment of the twentieth century.
Document 6: Chuck Wepner: Charles "Chuck" Wepner (born February 26, 1939) is an American former professional boxer who fought at heavyweight. As a world ranked contender he fell just seconds short of a full fifteen rounds with world heavyweight champion Muhammad Ali in a 1975 title fight. Wepner also scored notable wins over Randy Neumann and Ernie Terrell.
Document 7: Cassius Clay vs. Donnie Fleeman: Cassius Clay (soon Muhammad Ali) fought an eight-round boxing match with Texan Donnie Fleeman in Miami on February 21, 1961. Prior to this fight, Fleeman had a record of 51 fights with 45 wins including 20 knockouts. Clay won the bout through a technical knockout after the referee stopped the fight in the seventh round. This was the first time Clay had gone over six rounds in a boxing match. It was also the first time Fleeman had ever been knocked down in a boxing match. Fleeman retired from boxing after this fight.
Document 8: George Foreman: George Edward Foreman (born January 10, 1949) is an American former professional boxer who competed from 1969 to 1977, and from 1987 to 1997. Nicknamed "Big George", he is a two-time world heavyweight champion and an Olympic gold medalist. Outside the sport he is an ordained minister, author, and entrepreneur.
Document 9: George Godfrey (boxer born 1853): George Godfrey (20 March 1853 – 17 October 1901), nicknamed "Old Chocolate" by the press of the day in the last stage of his long career, was a Black Canadian heavyweight boxer who held the distinction of being World 'Colored' Heavyweight Champion during his career. He is not to be confused with the American heavyweight George Godfrey who claimed the same Championship 42 years after his Canadian namesake. Godfrey was inducted into the PEI Sports Hall of Fame in 1990.
Document 10: Patrick Graham (boxer): Patrick Graham (born October 3, 1969 in Calgary, Alberta) is a retired Canadian heavyweight boxer. He is not known for his skill in boxing, but for his toughness, strength, good basic boxing skills and durability. His boxing idol was George Chuvalo. Although he did not have Chuvalo's durability, Graham showed resilience, and the ability to compete in the sport.
Document 11: Muhammad Ali: The Glory Years: Muhammad Ali: The Glory Years is a 2003 biography of Muhammad Ali co-authored by Felix Dennis and Don Atyeo. The book is described as a photo-rich biography focussing on Ali's boxing fights starting from the age of 12 to his retirement. The book is based upon the authors's interviews with Ali, and also interviews with Ali's friends, family, opponents, and trainers. The book's coverage of Ali's boxing matches has been praised while the chapter on Ali's fight with George Foreman has been described as "an absolute classic." According to a review in "Mint", the book features "[s]ports writing at its best."
Document 12: Fight of the Century: The Fight of the Century (also known as The Fight) is the title boxing writers and historians have given to the boxing match between WBC/WBA heavyweight champion Joe Frazier (26–0, 23 KOs) and Ring magazine/lineal heavyweight champion
Document 13: Muhammad Ali vs. Antonio Inoki: The fight between American boxer Muhammad Ali and Japanese professional wrestler Antonio Inoki was held at the Nippon Budokan arena in Tokyo on June 26, 1976. At the time, Ali had come off a knockout victory over Richard Dunn in May and was the reigning WBC/WBA Heavyweight Champion. Inoki, who had been taught the art of catch wrestling by legendary wrestler Karl Gotch, was staging exhibition fights against champions of various martial arts, in an attempt to show that pro wrestling was the dominant fighting discipline.
Document 14: Muhammad Ali vs. Chuck Wepner: Muhammad Ali and Chuck Wepner fought each other in a boxing match on March 24, 1975. This was Ali's first boxing bout after The Rumble in the Jungle. The fight was billed as "Give the White Guy a Break". Ali won the fight after he knocked out Wepner in the fifteenth round.The fight is notable for being among the four fights in which Ali was officially knocked down in the ring, and for inspiring the 1976 film "Rocky".
Document 15: Facing Ali (book): Facing Ali is a 2002 book authored by Stephen Brunt; it is about fifteen different fighters from around the world who battled with Muhammad Ali in boxing fights. In each chapter of the book, one of the selected fighters recalls the experience of fighting with Ali. The profiled fighters include Ali's famous opponents like George Foreman, Joe Frazier, and Ken Norton; and also the relatively obscure like the German butcher Jurgen Blin who "was back at work at the sausage factory" after having fought with Ali the previous day. Other fighters profiled in the book include Tunney Hunsaker, Jean Pierre Coopman, Henry Cooper, Ron Lyle, Chuck Wepner, George Chuvalo and Larry Holmes.
ground_truth: George Chuvalo