Rosy the Pig
I had a pair of Rosy barbs with zebra danios in a 29 gallon, they were fine with the 6 long-fin danios, but the cories I think may have starved to death. The barbs were always harassing the cories away from their food.
It didn't matter if I fed the rosies first, and they were stuffed to near exploding. They bullied the cories out of algae wafers just as fast as shrimp pellets. Even if I fed some fresh greens to the rosies first, they still managed to scarf down most of whatever hit the water when I tried to feed everyone else. The danios competed fine, but the cories suffered. They even ate like pigs after dark, if I tried to feed the cories then.
They also ate my plants, my java fern and anubias coffeefolia suffered the worst, with every new leaf torn off. They ate my Malaysian Trumpet Snails, banging them on the glass until they pulled the meat out.
Just my experience...