I think there are some people that can beat Conor. Will they is an entirely different question. Nate could take the rubber match. I could see a Cerrone that's on his game winning a fight. Khabib and Ferguson are both interesting. I also wonder what a fight with someone like Michael Chiesa might look like. At 170 I think Woodley wins if he uses his wrestling. I think Maia is also a horrible matchup at 170. A fight with Lawler would be cool, however I think if Lawler can take Conor's shots, it would be a very rough one for Conor.
All in all, I think there are plenty of fighters that could beat Conor, just a matter if they actually would.