Accept it or not according to me Rafa is the only one who has a chance of beating him in the Wimbledon final. He is the only one who is mentally strong than Federer and also he is the only one against whom Federer doesn't feel comfortable no matter what the surface is. All the other players have no chance against him. Federer can beat them 100 times out of 100 matches.
I don't think Nadal will make the final, and if he does again, I will be very surprised once again.
But out of the remaining ones, except for Nadal, none seems to stand a chance.