It's impossible to tell since it's a different sport. But wrestling your entire life as opposed to just when you're a teenager is a really big difference. Because most people stop wrestling after 21, it's easy for people to overlook that NCAA wrestling is essentially U21 wrestling - guys who continue going to wrestling clubs can usually beat relatively high level college wrestlers just through years of experience and what not.
Usyk is also trained in Greco-Roman which I think is incredibly useful for MMA, and most American wrestlers aren't that great at clinching in general. Usyk is able to deal with much heavier men clinching him in boxing very well, so there is more reason to think his MMA wrestling will be better than someone like Logans I think (bar athleticism, since Logan is much younger). Jake is not even worth mentioning for reason you listed.
Junior college champs are usually still All-American level in D1 (or rather they develop into that by their upperclassmen years), so Jon Jones is a lot more accomplished than people think. His career was cut short because he needed money so he went into MMA, but he easily would have been an accomplished wrestler at a senior college. Perhaps not the level of DC, but certainly not to the point where it'd be strange his MMA wrestling is elite.