This would also be my view as a fighters best win. Especially when their 'championship fight' came in the NHB era. I have to say though, I disagree that 1998 was when Wanderlei was in his prime. I refer to my last post on this thread, in that I just think people have different views when it comes to a fighters biggest win. To be honest, it seems the both of you are using fights from the NHB era to justify your own points. The whole MMA game, from rule sets to quality of fighters has since changed dramatically, so I really don't think using these examples holds much water.
That being said. Franklin is Vitors biggest win.