RC, looking at their extant footage, I think Sammy did well to survive, but he was very seriously over matched, and I see no way he ever could have retained his lightweight title in a defense against Robby. (In my mind, SRR should have won the LW and LHW Titles at the expense of the upper and lower ends of the weight spectrum represented in this thread. I consider him a quadruple crown champion in absentia.)
One thing I missed out was, a big mark on Angott is that he wasn't the best Lightweight in his day, where the other two have more of a claim to being the best at their weight (even if just for a short period)