He's a good champion in a weak era. Not everyone has to be ranked as an ATG. Sometimes ya gotta except that you were just very good and not great. Nothing wrong with that.
I doubt Vitali has the punching power to "Sanders" him, actually I'm sure he won't be able to finish Wlad inside 2 rounds. Louis Monaco took him already 3 rounds.
Vitali was into kickboxing and a 6 time champion, If he did not do that and went straight to boxing there would be no injuries and he would have kicked ass alot more in boxing. Facts for you to consider.
Vitali seems to be overrated by some, underrated but many. In truth I would say it's difficult to place him because he didn't have the fights in his prime that would have defined his level. What I think is undeniable is that his 11 fight unbeaten come back as a past prime fighter (who was out of boxing for 4 years) shows that he was a lot more in his prime than his resume suggests