To be an all time great at something or in a certain place you have to have spent some time there...Jones was only at SM for a short period...I don't even think he had 5 fights at the weight class......

Joe Calzaghe was a SMW for pretty much his whole career and managed to hold the reigns tightly,

I have to pick Joe Calzaghe at SMW for the reason of his longevity and ability to stay on top during that stay..

With that being said....

At SMW I think Roy Jones was the most talented fighter to ever grace this sport and that includes SRR....I do not mean over all in their careers but just the version of Jones at 168...IMO he was as close to being unbeatable as any fighter could possibly be.....