2012-01-28: L[UD] vs. [#2MW] Chael Sonnen
2011-12-03: W[TKO] vs. [#88MW] Jason Miller
2011-02-27: W[TKO] vs. [#46MW] Jorge Rivera Listed rank, if he had not retired.
2010-10-06: W[UD] vs. [#132WW] Yoshihiro Akiyama
2010-05-29: W[UD] vs. [#42WW] Dan Miller
2010-02-09: L[UD] vs. [#23MW] Wanderlei Silva
2009-11-14: W[TKO] vs. [#88MW] Denis Kang
2009-07-11: L[KO] vs. [#2LHW] Dan Henderson
You have to put some confidence in our rankings for the purpose of this list. Now in all fairness, when analyzing the wins, nearly all of the fighters were ranked higher prior to Bisping beating them. This is the only reason that hes as high as #14 here, but this also goes to show you that his worth is overrated, as not a single one has stayed in the division AND improved their rank. In fact, two of them have retired (Rivera and Miller). In fact, when considering the losses as well, you could certainly argue that Henderson is the only one on the list to improve his status since fighting Bisping and we all know how that fight went.
I can only presume that Bisping holds such a lofty rating due to his visibility and also due to his competitive fight with Sonnen, which ultimately, went down as a loss. I think this begs the question, how much can a competitive three-round unanimous decision loss do for your ranking?