I think Cox is the best bet. I don't think he beats him in a series, but would not be surprised if he took a match.
I don't see him going 125 KG unless it is some sort of club VS club dual like the Flo RTC cup and not as a true 125 KG just as a bump. Even then I don't see it as they have three gents there at 125 KG already.
I don't see anyone in our current crop of 184, 197, or 285 NCAA guys having it at 97 KG. I don't see any of our current 86, 92, 97, or 125 guys aside for Cox being able to have it at 97 KG either - and as I said Cox doesn't take a series from him.
Unless it is an InjDef like Gadson I don't see it in the next five years.