Well, when the male realized he was a beast he took dominance over the growout, so I had to move a few fish out, then he hit 3.5" and I had to isolate him from the remaining few, but now the female @ 3" is proving to be just as mean and territorial, so I plan on re-arranging things again, but I just paid my friend in beer and pizza to help me move over 150 gallons of tanks 2 days ago and I just don't have it in me to do anything else in the fishroom right now lol but yea, i'm still struggling to figure best tankmates for these little savages even at 3". ATM, they are with a 4.5"-5" male GT and a 2.5" and 3" Dovii and a few heavily armored cats. The male RTM is in a breeder net for a few more days until I decide whether he can live w/ my other smaller stage 2 CA-growouts (2" - 5") or if he will need to stay in the stage 3 growout tank w/ the 6" - 8" 'ers and bigger catfish. My money is on the biggest badasses.....these RTMs are unlike any aggressive fish I have ever seen. Ignorant, belligerent, fearless and downright ruthless.
I wish I had a pair, along w/ the Friedreichstahli....supposedly my friend can get them in their shop,, but I have yet to call him back and find out if they came in. Mayans - Uropthalmus - are on my list too, the OP may find them to be quite enjoyable as well as Festae. but again rather beastly psychopathic monsterfish that may or may not tolerate tankmates.....could be a gamble. I have been hearing recently Loiselle's are somewhat mild in aggression compared to other Parachromis species, so your suggestion may just be his best bet for community
