Dubois could probably take a full force nuclear right hand from Wilder followed by a sniper straight left from Big Bang in succession and shrug it off, then get jabbed unconscious by Charles Martin.
GGG dropped a few opponents with his jab. I don’t think it was ever the finishing blow in his fights but still really impressive. I think jab knockdowns say more about the person throwing it than the one getting dropped. It’s some pretty hardcore stuff if you can turn your jab into a ko weapon.
I'm still impressed by Crawford completely jolting special K out of his body by that jab, just shows a well timed ramrod jab to the skull can mess your entire perspective up. Then Brook shook Khan with a jab after Khan had laughed at Brook being dropped by a jab lol.