I think Wilder and GGG are the meanest fighters in boxing. I think they both have absolute belief in their ability to destroy their opponents. They think nothing of it and respond like Gs when they put hurt on their opponents. They also share the same ability to become vulnerable when they have the capability and the skills to be more defensively sound. GGG's fight against Brook was one of GGG's worst defensive performances, while his fight with Lemieux was 100% on point. Wilder also performed poorly against Molina, but shined in his one sided domination of Stiverne who was very dangerous at the time. I know their is discontent for both fighters, but if you could the emotions to the side for a moment, it's hard to disagree with this assessment based on at least popular fighters.
Artur Beterbiev appears emotionless, but you can see the meaness in him . Crawford has a mean side to him as well (I enjoy it) dont let his silent personality fool you.
Tony Ayala jr was known to be mean both in and out of the ring. They claimed he spat on guys he'd Ko'd
Haven't seen enough of Beterbiev, but I agree with you about Crawford. What ever happened to Beterbiev?
Chris Eubank Jr kills careers for fun he bashed the last 5 blokes so badly only one of them has fought since and even he took 9 months to get back on the horse
Wilder shows concern for his opponents. Golovkin has that soldier mentality where your destruction is just a job. Kovalev has literally tried to kill someone (and admitted to doing so) AFTER he has already killed a man in the ring.