I tried to add a male to my community tank, Tried several times. He was just to grumpy around everyone else. Attacking everything but the Peacock Eel [ Which had some strange attraction to the Betta

8O ]
I recently bought a small [ about 1inch long ] female betta, and put her in the community tank. She gets along fine, playing with a baby Sailfin Molly of similar size to her, hiding in the hornwort, eating, ect ect.
Its most likely best to get a young betta, since they can grow into being with the other tank mates and such, as opposed to taking a grumpy, old fussy goat and trying :P