Buy a group of both as juveniles. Wait for a pair to form between a jag and midas. Then remove the rest and get rid of them. Bam. You got both. Other then that, your gunna end up with one or the other, most likely
You can experiment at the peril of the other fish.
In tanks the size of a 150 fish like those often end up being housed alone.
Other people may recommend other robust cichlids but I would try smaller more peaceful cichlids if you want a community.