Beating Jose Aldo is not easy. I've never seen anyone else do it. Whoever is the LW champ has to be a killer that division is always stacked. I agree Khabib is the guy to beat but he hasn't been around. That fight will eventually have to happen.
As for those other guys they never inspired to take the chance. Aldo one time got told he would have to lose the FW belt to fight Pettis. Didn't wanna take the chance to have no belts. GSP said Silva was too big. Silva was either friends with or wanted to be friends with the LHW champ. They all talked about doing it for more money. But none of them sell PPVs like Conor to negotiate something like that. Back in the day promotions was holding the superfights back (Fedor vs Randy) now its the fighter. Moving up and losing can hurt your legacy. Every champion protects their legacy. Conor is putting that legacy on the line, even took a L in the process. Didn't even stop the train one summer.