This is a good analysis. If I were you I would take it a step further. Sometimes numbers don't mean much. There are some extremely over protected fighters out there with great records filled with nobodies. I mean look at Valuev.

How about a poll of how many current and former champions each has faced.

An interesting stat would be the KO% of the people they have fought. Just too see how dangerous these opponents really were.

Titles in multiple weight classes should also be a big factor.

Overall, great post and CC for good idea.