I am a big fan of Joey Davis - always was and always will be.
That said, his senior year - in which he won at 184lbs, he scraped by in a 4-2 Decision victory over a ~0.500 wrestler from Penn who was also coming up fro 174lbs.
Add in that despite him having a good size advantage on Alex Dieringer at the ASC, Dieringer dominated - dare I say destroyed - him.
His Junior year he did beat Ottinger (CMU starter, multiple time NQ, Mark Martin (OSU starter, multiple time NQ) and Wilps (Pittsburgh starter who placed 7th that year) at 174lbs, so maybe 184 wasn't the optimal weight for him.
So if he isn't going to be a good example of those who could succeed from D2 to D1 then I don't know who would be.
There are many examples to pool from. Unfortunately there are going to be more D2/D3 guys who don't find the same success than do, and there are going to be many more guys who don't find success at the D1 level that do at the D2/D3 level. There is a reason D1 is considered the highest level.
Edit: Isaiah White is a good example, but I think he is an exception. Particularly because he was supposed to go the D1 route and couldn't academically make it, so his 'pit stop' was to fix those issues.