#7 Henry Armstrong
Featherweight, lightweight, welterweight
Career: 1932-45 Record: 151-21-9 (101 KOs)
Henry Armstrong, who boxed between 1931 and 1945, held world titles in three divisions – at featherweight (1937-38), lightweight (1938-39) and welterweight (1938-40). One of the most exciting fighters ever to grace a ring, he was renowned as a great body puncher and threw to head and body relentlessly. For that, he was known as "Hurricane Hank".
His career started on the losing end but he gradually getting on the winning streaks. He has also had 27 consecutive victories and all of these were knockouts. That reflects his greatness in the boxing arena. He was a whirlwind of a fighter, a perpetual-motion machine who overwhelmed opponents with a nonstop, suffocating fusillade of punches.
Henry Faced 17 world champions in career and defeated 15 of them thus rightly deserve to be called one of the most dominant Boxer of his time.