The Hirano/Yasukawa incident was a really just a shoot, which has happened a million times in a wrestling ring around the world in the history of wrestling, especially in yesteryears. This, to me, was not even on the same level of, say, Choshu/Maeda but the end result is what made it arguably (seem) worse and quite tragic. At the end of the day, it was two wrestlers who shot on each other with one being the far superior fighter causing some life-changing harm. Also, being two female wrestlers, I think we view it with a slightly different lens.
Brody, he took advantage of a few wrestlers but it was pretty much the norm outside of the Luger incident. Brody never really shot on anyone even to the level of Choshu/Maeda. He stiffed a few people but so did most of the veterans of the time. Brody's "unprofessionalism" had more to do with his treatment of promoters and promises. Brody broke numerous deals he brokered and came and went as he pleased but again, it had more to do with business as opposed to his fellow wrestlers inside an actual ring.
Guys like Hogan, Austin, Flair and others fall into the same box; politicians and can easily be seen as unprofessional based on numerous incidences they have had but alot of it had to do with but it's more backstage stuff and picking and choosing opponents to push or job. What they did was really part of the job as a top wrestler and isn't anything most wouldn't do in the same position.
Michaels, to me, still stands as the most unprofessional wrestling STAR of all time. I'm not even talking simple temper tantrums, overselling, making a mockery of his profession IN THE RING, but look at how many times he has refused to lose a belt in the same fashion he won it; IN THE RING. This is a guy who refused or found a way to lose 5 titles (between World/IC/Tag) without ever having a match. He won all of those belts through a fellow wrestler "laying down for him" and he lost 5 of those belts without "laying down for anyone". In the process, he didn't give his fellow wrestlers the chance to be in the squared circle with him, to get some shine, some rub, and beat Shawn Michaels. Without going much futher and being too verbose, this is why Michaels is easily the most unprofessional wrestler of all time.
PS. New Jack is a criminal and if we include him, he's in a category all by himself as he's legitimately assaulted his fellow wrestlers with chairs, blades, knives among other things and he's done it again and again. He should be in prison, simply put
