woofy - "now in my 125g i have all three of those fish, a 7" red oscar a 8" texas and a 6" midas and a 3" midas. i have never had any issues."
^Ok, it may work and I may be wrong in the end but in this group the midas are still very young and small compared to the others and I think you may have some issues as they mature. My guess is the texas will hold it own pretty well but your oscar will get bullied.
CichlidMan416 - "I currently have an 12in Oscar and and a 10in Oscar and a 6in Green Terror, they have grown up together and have never gotten into anything severe."
^Oscars tend to do pretty good with other oscars, a little bullying but not much compared to how other fight go. The green terrors tend to be passive aggressive more, and defend themselves and even chase another fish away if they get picked on, but won't bully much. I see this as a tank that could work well for quite a few people, especially if all are raised from 2 inches or so together.
I have had both oscars and green terrors before separate from each other but with other fish. I kept my oscar in with a couple blue acaras and a keyhole cichlid, along with some blue and gold gourami and they were fine. I currently have my male green terror in with 4 blue gourami, two albino cory cats, and two syndonis featherfins and the only chases in that tank are the syns chasing eachother and the cory cats racing around on the bottom.
Instead of trying to mix a bunch of big cichlids together you may want to consider a dedicated pair, like a pair of green terrors, and then some large 'dither' types, gouramis, tinfoil barb, I have had a school of tiger barbs in with my green terrors and they do well, parrot cichlid, a school of silver dollars, pictus cats, etc. Even when my green terrors bred they didn't beat up anything in the tank, just chased them away about a foot. Just some thoughts.