You may be right ,years ago I spoke to a man who had seen Langford fight,he said he was a terrific puncher and very strong but fairly easy to hit.
I favor Roy Jones the most at 160. Roy, committed to his defense, is going to make it difficult for Langford to catch effectively enough to grind him down for a late stoppage.
I agree with achilles choices above and add Ketchel & Greb Fitz, Walker, and several others have a shot.