Right now I think Derrick Chisora might have the most stacked list of opponents out of any boxer. Of course I am aware he lost most of these fights but the fact he fought this many champions and contenders is incredibly impressive. Here is a list of just a few. Vitali Klitschko Tyson Fury 3x David Haye Kubrat Pulev 2x Dylan Whyte 2x Carlos Takam David Price Olexander Usyk Jospeh Parker 2x Joe Joyce Otto Wallin Can you name any active boxer who has fought this many big names?
I'd also add Robert Helenius who was undefeated and seemed destined to challenge for a title when they fought. Pretty bad decision against Chisora. Solid resume especially for a guy who never won a title
