I have personally kept all of these fish before except the bleekeri, but am familiar with it.
The argentea are stunning, less common, and get a lot of attention, but are sneaky fin nippers when kept with other fish. Mine would constantly pick at fish even twice his size growing up and was skittish if he was alone though. Bleekeri and midas would have the most confidence and character when kept solo probably.
I wouldnt pick just one, I'd try to keep the JD with the bleekeri or the red devil. Whichever gets along better. Short term though. .. get the argentea out in his own tank temporarily. More fish will die soon.