I tried to find an example of Langhorne playing that kind of finger-picking, and couldn't come close, though there's not much available on YouTube or Spotify. He does accompany Odetta on "Don't Think Twice" on the great 1965 album "Odetta Sings Dylan." But he's doing bluesy fills on that.
I listened to Bob doing "Don't Think Twice" on the Bob Dylan Live 1964 bootleg series CD, but there he flat-pick strums it.
The closest I can think of where Bob does that kind of finger-picking is "500 Miles" on the May 1, 1960 tape at the home of Karen Wallace in St. Paul. He also comes close on "One Too Many Mornings":
https://www.youtube.com/watch?v=Ox42QVcfTtI. There are probably other, even closer, examples I'm forgetting.
I would say that unless we can find an example of Langhorne playing that style, the case is closed thanks to Eyolf. (Why does he call that amazing work "Things Twice"? Does his take on "Don't Think Twice" figure into that?)