Pikes in my experience really aren't that aggressive the ones I have had simply pick out a small cave and defend it unlike fish like Red Devils they will not harass and chase a fish through the whole tank they simply chase the fish out of that little cave they chose. The pikes I have had, have been Johanna and Orange Pike Cichlids. Cubans atleast in my opinion are a lot like Salvini-medium sized and can hold their own. I personally like your list of Jag, GT, Male Con, Salvini, Cuban, and Pike-but to be safe I would cross out the Jag since it will get a lot bigger and in my experience they really aren't that aggressive until they hit 8 inches then they become psychos.
But, if you were to get the GT, Male Con, Salvini, Cuban, and Pike you would have minimal problems
GT-10-12"
Male Con-5-6"
Salvini-7-8"
Pike Orange 10-12" or Johanna 14-18"
Cuban 8-10" kind of resemble a smaller version of Haitian cichlid
Plus while they are small you could get a school of 4-5 Silver Dollars
The trick is too get them as juvies and at the same time-plus have a lot of caves.