Not sure what you mean by the previous generation. As far as HW, guys like long time champ Sylvia certainly wouldn't humiliate anyone today. Pride had a grand total of 3 guys whos names I don't even need to mention that could beat most if not all of the HW's today, the rest were pretty lesser in those days also.
Sham never really had any good victories from today's perspective (his wins over Bas were literally when Bas knew NO submissions), and wasn't the clear top fighter in the first MMA generation (2 generations ago); Severn and Gracie were as good or better, and that really make the idea he could beat anyone good today look ridiculous. He landed some good shots on Fujita, and had really improved his striking, but he had to quit when he ran out of gas, and would have gotten smashed by Fujita on the ground if he had continued.
I get that you like Sham, and I worshipped him in the 90's, but in retrospect, he is more revered for his pioneering than his actual ability.