Decent fighters that you could see winning over top rated ones.

Every boxer has at least some flaws to their overall game. Sometimes less rated fighters spell big trouble even for the great ones.

I can see Kubrat Pulev winning against a prime Vitali Klitschko. I can see Jarrell Miller giving Joshua big problems.

And so on. Which less rated fighters would you think would bring the biggest test for the higher rated ones - or even manage to beat them?