Holyfield wasn't 5'6 and didn't start his career at Lightweight. Not that I'm saying Langford wouldn't win. But Holyfield was at least a HGH induced, large heavyweight and about 6'3. The point of this topic is to pick who would win amongst one the largest heavyweights in history vs one of the smallest.
Langford could have started his career at Strawweight. He was still more live than Holyfield, who beat Valuev. He wins.
Maybe you believe Holyfield's extra size negate how severely washed-up he was, & what an inferior fighter he was to Langford even at his absolute peak. I really, really do not rate Valuev.
