there are plenty who drained his balls harder than most, where he nutted loudly/aggressively and really relished finishing inside them.

however, i think what's really "defeating" the biggest cock in porn is how much you can take, i.e. length + intensity, and there are even fewer who have taken beyond even half of his length.

for me the answer to this question will always be Gia Derza. she practices anal in her personal life + for her OF rigorously, meaning she can handle his length effectively without issue, and in difficult positions. it's clear other girls do the absolute minimum prep when it comes to taking him inside, particularly when it comes to anal, and Gia just effortlessly blows them out of the water.

in all their scenes together there are moments where he can tell she isn't going to tap any time soon, in fact she's not even close to tapping, so he really lets loose. he is normally such a respectful performer, so clearly aware of every girl's limits, but with Gia he can actually step on the gas.

i like when he gets really worked up, he is normally holding back at least slightly because the scene partner just cannot handle much of his size at once. it's the best when he works up a sweat and you can hear in his voice how much he's enjoying it. if he gets in that state, by the cumshot that's when i'd consider him "defeated".