I guess it comes down to Jackson's chin. If it was breakable as some have concluded, then Tham ith gona break ith. If it goes to the cards, then the smart money is on Jackson.
I pick prime Sam over everyone pre Louis apart from Jeffries and Johnson. And you want both men in their primes.
Langford had a lot of power, guts, and some skills, but defense was not his thing. Jackson had solid power. Better than Johnson, and likley better than Jeanette. In their primes 15 rounds and under, I like Jackson. In a 20+ round fight, I would pick Langford. Much depends on Jackson's mobility, which reports said were good.
Jeannette has an impressive list of kos but the vast majority are over journeyman.I seriously doubt his power compares to Johnson's. Jackson was a fine boxer and mobile , [when he did not have a sprained ankle .] I don't think his chin was too sturdy and if Langford lands I would expect it to be the end. You base your estimate of Jackson's power on a line from Siler's book, his record does not support him being a big puncher. He could not floor Corbett in 61 rounds. n.b .Siler, referring to the Johnson Hart fight does not say Hart beat Johnson, he says Johnson was "decided against".:think Jackson v Langford is pretty much a toss up imo. I lean a shade towards Langford
Choysnki could not floor Corbett either in 30+ rounds! Still questioning his chin? Siler felt Jackson was better than Johnson, and hit hit harder. As for who had the better chin between Johnson and Jackson, I don't see Jackson getting Ko'd or floored by super middle weights. Jackson once sparred with Fitz, and got the better of Fitz. I do think Jackson's chin was suspect ( Goddard, Jeffries ) to punchers, but its wasn't of the glass variety for sure. Jackson was a swift out fighter. He's going to be in the best place for him, and the worst place for Langford. Could go either way
I was always a little surprised that Nat Fleisher didn't put Peter in his top ten with his penchant for preferring early nineteen hundred fighters, but it also makes me wonder if his makeup as a whole wasn't thought of as highly as it has become. Anyways Sam at his best and with a two fisted attack would be tough for any of the one punch at a time fighters of the time.
Jackson was a note one-two guy; Corbett said Jackson had a great variety of 1-2's, to the body as well as to the head.
Choynski was a novice when he fought Corbett.Johnson was floored by a super middleweight when he himself was one. I throw out the Ketchel kd as a fake.