McDojo- where you learn a traditional art, but never really train
Pro-Wrestling- where you do a lot of unrealistic moves on a cooperating dude, but you have to throw human bodies a lot
Rugby - where you don't really fight anyone, but have a lot of hard tackles and contact
Ice Hockey- where you end up brawling quite often

From the above obviously and historically proven answer is pro-wrestlers, since they transition even into MMA with minimal or NO extra training.

Pro wrestling is unbelievably tough on the body, and is only for the few born with high pain tolerance and durable bodies.

If you think there is a rugby or traditional martial artist who can take Haku in a real fight, you’re an idiot who knows nothing about fighting. Only elite HW MMA fighter has a chance VS Haku in a self defense situation, and not a good chance at that. Better be really alert and sharp.

Basically the answer is pro-wrestling IF you know anything about pro-wrestling. That being said modern pro wrestlers are more pussy than old school, so...

Why isn't 'Fighting Homeless People' not an option?

Hockey prob attracts the best athletes. I would bet on a 'pro' wrestler if they're actually competing for the Olympics or something.

Most (all ?) pro wrestlers who transitionned to MMA and had success did high school wrestling, which is the source of their fighting abilities, NOT pro wrestling, here, he's talking about what makes the best fighter in itself, in this case, it would be rugby, not pro wrestling, any pro wrestler who went straight into it will get absolutely dismantled but a rugby guy in terms of fighting / street fighting.

Yo Ad mate .... it been a while, hows u???

So pro wrestlers instinctively know how to box, muay thai, submission grappling, jiu jitsu, transition from striking to grappling/wrestling????

fighting IQ and being fearless/calm during fights makes the best fighter.

you can be black belt all you want if you lack these compenents you'll never be the best

Pro wrestling does teach basic grappling/submission moves that could be applied in real combat scenarios and also teaches you how to land optimally if you are getting thrown. Even the pro wrestlers that don’t have folkstyle wrestling backgrounds, just talking about guys who lift and do pro wrestling will be able to handle the majority of the population in a combat scenario.

Pro wrestlers usually come from college wrestling, and college wrestlers absolutely maul traditional martial artists (see Mark Coleman or Mark Kerr in early Vale Tudo/UFC days) and those who survive in pro wrestling for any kind of a lengthy career are those genetically gifted with high pain tolerance and hardened bodies, to withstand years and often decades of abuse, both physical and from drugs and terrible life style.

Also historically top pro wrestlers had to be real “shooters” (aka actual fighters or at least possessing very formidable real fighting skills) because of the danger of a double cross, meaning someone would refuse to lose to them, or someone would try to beat or hurt them for real in order to get ahead in that business etc. So a top belt holder in some pro wrestling territory would have to be able to beat up pretty much anyone for real if they try to go rogue during the match.

I would bet my house without a second thought on Andre The Giant or Haku or Barbarian etc. VS any rugby player ever in a real fight. I don’t know if those guys ever had high school wrestling background tho...

Can you show me an example of actual fighting skill displayed in the fake wrestling events?

RVD would literally kill a miscer with a single punch if he chose to, he would not have to do any of his jumping spinning hook kicks. But I’m not sure you understand how this works...

In short, strikes in pro wrestling are similar to what stuntmen take from fighters in movies. For example when they shoot lets say that stupid prison fight movie where Michael Jay White fights that Boika character played by a taekwondo kicker (Scott Adkins?) , so even thou Adkins is an actual Martial Artist, as is Michael Jay White, with at least some full contact experience in competitive tournaments in their past, they would NOT deliver the kicks in that same manner, since they would send each other to the hospital. Instead they kick each other with the rib/side of their foot or with their toe, instead of a heel. OK, so then did they or did they not displayactual fighting skill? After all they did the kick, but with the wrong technique in order not to hurt the partner. Do you see the issue with your question? Goldberg gave Bret Hart a concussion that ended Bret’s career and gave him brain damage. I guess if we use your verbiage we can say Goldberg displayed actual fighting skillthou he wasn’t supposed to and didn’t intend to.

Thing is Haku spent his entire youth training rugby than became a sumo and presumably also did some weird Polynesian biting art. Most wrestlers, who transitioned had an olympic background or did some catch wrestling as well.
I lean to wrestling too, but I still thought it was an interesting thought experiment.RVD has a kickboxing background and even did some proto-MMA stuff IIRC

A lot of shoot style matches in Japan. Here is a semi-recent American one though.

A lot of high rated MMA pros come from traditional martial art backgrounds.

Is BJJ McDojo?

Good point. BJJ has really diluted in recent decades thou. It used to be that a blue belt was rare and a formidable force on the mat, people would see a purple belt maybe once in their life, now there are black belts in every town getting subbed by white belts in tournaments...

BJJ turned into a bunch of soy cucks sitting around smoking weed. Not good. Hopefully it turns around.

Karate too produced some strong fighters when they switched to a more realistic fighting, Andy Hug, Machida, and so on.

One thing about traditional arts thou is how unprepared they are for the real thing. Recently a UFC pro from my MMA gym went to a traditional world championship and got a medal with literally zero camp or training, the traditionalists were totally WTF’d by his western boxing and MMA randomness and speed. Traditional Martial Arts need to evolve or face extinction.

I would say McDojo isn't about the art, but about the way they train.

For the sake of this thread: McDojo=no sparring at all, only Katas or nonresisting oponents, while thinking of yourself as superhuman