Thanks Solomon I was hoping you'd chime in on this. Now seeing that gars work with other gars best from what all of you have said, what if I used the money I made to get the PBB and instead I got the Cuban AND the Tropical Gar to go along with the Ornate Bichir and the Endlicheri I already have and just make it those 4 for now and if another nice gar comes up somewhere along the line add it in... (not a gator gar). Could an 8-10 inch Tropical gar go in with a 6-7 inch Cuban?
I certainly would go with both if you're fine with that. The gars should be fine as long as they're similar in size, so it would be best to get a tropical gar on the small end of that range & a Cuban gar on the large end of that range; they might be fine if there's a few inches difference (maybe 3"), but it's always best to play it safe.
Also I'm trying to get a gauge here on something; is the difference in aggressiveness between Cuban Gars and Florida gars more like the difference between a Jardini and a silver arowana or more like an African Lungfish and a South American Lungfish?
Neither of those comparisons are good comparisons as both jardini arowanas & African lungfishes shouldn't have any tankmates while Cuban gars can have some tankmates.