Anyone at WW or heavier it wouldn't even be fair.
I've always heard Lee walked around at 132, meaning no way he could cut to 125 seeing as he had like no body fat. 135 would be his class, which is why I said Faber.
If you want to take Lock hards post literally, then yea, obviously any LHW or HW would fucking kill poor Bruce Lee. Imagine a power double leg from Chael followed by ground and pound lol. Lee didn't have any grappling experience to my knowledge, so he would be a fish out of water. Become the teacup.