Khabib.. As much as one can point to the "quality of opponent" on his record, but with his known skill set and strength, I just do not see Conor beating him. He beats Conor TKO by Ground and Pound in the 1st or 4th or Submission via Rear Naked Choke in the 3rd.
Ferguson.. As much as I would like to think Tony can beat Conor, I think Tony keeps that chin poked out a little too much, and gets caught too much in the stand up imo to finish Conor or last 5 rounds. Maybe in a 3 round fight Tony could win by a split dec or body kick if he can push the pace for three rounds and utilize that unorthodox style. Conor beats Tony TKO in the 4th or by Split Decision.
Barboza.. I actually think Barboza beats Conor in every aspect, plus is much more athletic and faster. BUT.. Barboza can get caught with the left and although he has a decent chin, I think a clean left from Conor would end that fight. Barboza beats Conor KO by Head Kick in the 2nd or Body Kick in the 4th.
Lando.. As crazy as it may sound to some, I think Lando right now, could beat Conor and take the left if he got caught with it. Plus his I think his MMA skill set and heart are deeper then Conor's. Lando beats Conor TKO by Punches in the 4th.
Nate.. IF Nate can channel the early days of training at Fairtex SF and actually check kicks like he knows how to, plus use is Judo skill set more when in the clinch or against the fence, he beats Conor in the third fight in a dominant fashion. Nate beats Conor by TKO by Punches in the 3rd or Submission via Triangle or Guillotine in the 4th.
RDA, Melendez, Duffy and Gall I think have a chance at beating Conor via Split Dec or Submission in the 5th. Everybody in the top 15 at 155 in the UFC (Bellator Chandler/Thompson beat Conor, WSOF Justin has a chance) has a chance at beating Conor in some way shape or form, but I don't think would "perform" currently against him if the chance came right now. If Aldo came up to 155, I think he has a better chance then at 145 and can win TKO via Body Kick and Punches or Submission. Cruz has said he wants to fight Conor at 155, so if Cruz can actually KO Cody, not TKO, but KO Cody and take a big shot from Cody, I think Cruz beats Conor by UD or Submission. Swanson says he wants to come up to 155, but think he gets TKO'd by Conor. I think Pettis loses a UD to Conor. If Holloway comes up to 155, he TKO's or Submits Conor in a rematch.