Are black/brown rice, green mung beans, black-eyed peas, black beans, adzuki beans acceptable?

Yes, as long as they are cooked well and do not cause gas and bloating. Grains and beans should be soaked before cooking and cooked with kombu (and potentially broth) for digestibility. I'm also a fan of organic soaked seeds: sunflower, pumpkin, squash, sesame; and some soaked nuts and WILD rice, which is not a grain but a seed.