i think the OP wants to know if the fish combos will. I'm sure he will adjust his stock once he gets the tank. Thats if Santa has him on the nice list...
Maybe Santa Claus will bring you some of those wild caught ebjd you've been talking about
You must know the tank size before you consider its potential stock.
But part of knowing if a combo will work is knowing the tank size. If I were to mix my chocolate cichlid and my parrot cichlid in a 90 gallon tank, the parrot would harass the chocolate to death. But once I moved them to a 210 and they each had adequate space, they tolerated each other. So it's still a hard question to answer.
Hypothetically those fish will work together, but I would suggest way more than a 75 gallon tank. You're talking about three semi-aggressive fish that have the potential to reach large sizes.