The tank is pretty big, so it could work, just keep a close eye on it.
Edit: I had a similar post about this, and we came to the conclusion that in theory, you could create a wild environment with a large enough tank. We also came to the conclusion that even if the tank was 200 gallons, with only 2 males, there is a chance for fighting/death. Imo, I would rather divide the tank or start a sorority. You could divide the tank 5 ways and still have happy bettas, and you could have so many females if you wanted a sorority.
You can see if it will work, just understand the risk. The risk would exist even if you divided the tank because they can jump, and in a sorority, they could/will fight. If you see fighting, remove them before it worsens, otherwise, do not be surprised if something goes wrong. I do not think people should get mad at OP. Fishkeeping is about the inventiveness, and discovering ways to do things that are thought of as impossible. I know that my fish, Sigmund, is very calm, and might get along with another male, every betta is different. I don't think anyone should close the thread because valuable info has been given.