Well Jimmy Young beat him quite comfortably points wise, and also took his best in 7th round and come right back.

Jimmy Young was very underrated he deserved decisions against. Shavers, Norton, Ali, but thats the way it goes.

As for George Foreman blowing away everyone, i think he loses to these guys.

Muhammad Ali obviously
Jimmy Young again
Larry Holmes
Lennox Lewis

There's probably quite a few others aswell, basically anyone who's a good mover with a good defense and a solid enough chin has a chance.