I can't call Anderson Silva the most complete fighter ever, since the blue print is there on how to beat him. St. Pierre is another guy who can be beat standing and subb'd before, and Frank Shamrock never had the best defense for wrastlin.
All good, well rounded guys but Fedor takes the cake. We're talking smack about the guy lately (me too) but everybody was wondering after the Cro Cop fight "how do you beat him?" You can't soundly outsttrike or submit him and even if you get in his guard you're screwed.
As mentioned, Fedor can be cut. Hell, Lindland opened him up pretty bad. It will be interesting to see him in the US with elbows in play.