Calzaghe... Hatton... Gatti... Green... the trend seems to be to overrate these guys, but hey, why would the truth matter.
The one thing that annoys me is, if these guys aren't constantly fighting on American TV against American 'name' fighters, they are overrated!?!?!? The issue with them is the era, but, taking away who they fought, their skillset would damn sure give a Holmes, Ali, Foreman, etc. trouble. Would they beat any of them, I can't say they would or wouldn't, but to discredit them because of their race, location or era is foolish!!
As far as the list you mentioned, Calzaghe was definitely IMO not overrated, he was a very talented fighter. Is issue was, he was unwilling to come to the states to fight for all those years, and IMO why the hell should he have had too? He was the champion, had built himself to a position to make millions of dollars to fight at home, so who the hell needed a Roy Jones then? And, we are STILL acknowledging how great B Hop is, and he is definitely one of the greatest fighters of this or any era, but... if I'm not mistaken, Calzaghe beat him?!?!?!? So how can he be deemed overrated!?!?!?
The bias we have for stateside fighters is laughable... Would I make him or his brother Top 10? Quite possibly because one, I've been able to see them, and analyzing them against fighters from an era I didn't experience is taking someone elses opinion and making it law, and 2. I sincerely believe their understanding of their strengths, and how to use them is what makes them such great fighters! They have not fallen into the trap of a lot of fighters, especially those who give in to the pressure of the American public opinion to be more ''exciting' or 'marketable' only to have it shorten their shelf life is what has also added to their longevity as fighters...