I would reverse the point as well and say that generally in Fedor's era "top 10" had much more relevance than in recent years, the era around the end of Pride I think is arguebly the strongest the top 10 at HW has ever been with Fedor, Nog, Crocop, Barnett, Arlovski, Werdum, Aleks, Sergei, Sylvia, Hunt, to be a top 10 fighter at that point was a mark of really elite skill.
I think in the current era a very good chance guys like Coleman, Fujita, Randleman, Semmy, Goodridge, Herring, etc would be top 10 or higher, Semmy honestly I think could potentially be champ in the current UFC given the relative lack of quality grappling.