What dimensions are the 140 gallon, it is not a standard size. If it is a 6 foot tank you may be able to add some smaller tough CA cichlids like convicts with your carpintis. If your carpintis hybrids are males, three would about fill the tank even if it's 6'. If you have a female and they breed, that would also just about fill the tank. If you want more variety of cichlids, I would recommend keeping your favorite of the 3 carps and re-homing the other two, and you should be able to get some other CA cichlids that would live in a 140 with the carp. Some species that come to mind would be Nicaraguense, convict-types like cutteri, jack dempsey. In a 6' 140 you could probably do a community of CA cichlids like this, but such a setup is a gamble and a balancing act, smart to have another tank on standby to shuffle fish around, because there are no guarantees it will work out.
And I agree with duanes, the carpintis being hybrids makes this all quite unpredictable, if it ends up growing to the size and attitude of a flowerhorn, you may be looking at a single fish even in the 140.