Lightweight and Welterweight are the two highest mountains a fighter can climb in the UFC. These divisions are 50% bigger than the next biggest division. Becoming the king of those divisions is more difficult than any other. According to UFC.com here are the number of fighters on the roster in each division: FLW - 40 BW - 64 FW - 77 LW - 111 WW - 112 MW - 76 LHW - 46 HW - 37 Pettis has also dominated and finished his last 4 opponents in under 10 minutes. Even Aldo and Jones have only been able to finish 1 out of their last 4. Jones and Aldo do have the better body of work over their career but if you are just talking about who is the best right now I think Pettis is the guy. If I ask myself which champion is most likely to dominate opponents in 2015, Pettis is my answer.