Question: who is considered the best heavyweight boxer of all time?
Answer: MUHAMMAD ALI. 56-5 (37), 1960-1981. ...  JOE LOUIS. 66-3 (52), 1934-1951. ...  JACK JOHNSON. 56-11-8 (36) , 1897-1931. ...  ROCKY MARCIANO. 49-0 (43), 1947-1955. ...  GEORGE FOREMAN. 76-5 (68), 1969-1977/1987-1997. ...  JOE FRAZIER. 32-4-1 (27), 1965-1981. ...  JACK DEMPSEY. 54-6-9 (44), 1914-1927. ...  LENNOX LEWIS. 41-2-1 (32), 1989-2003.