I just went back and reread your 1st post.
And although the vittata are from S America, they are from quite a bit further south than most other species you mention, such as the angels and most ram species, so habitat may be quite different, and thereby species combinations might need to be considered more closely to quell aggression.
I wouldn't consider the vittata as being asinine, they may be just doing what fits into their natural realm of experience, albeit a different prospective that the one you imagine
Although M altispinnosus is found close to the edge of that same southern area, habitat preferences might be quite different (the rams preferring much warmer shallow waters) and vittata much more territorial.
Since I'm a biotope adherent, I'm very anal about these combinations, and am much more restrictive about what species I will mix together in the same tank..
I never would mix northern S American cichlids, with southern S Americans,
Just as I do not mix cichlids from west of the Andes mountains, with those from east of the continental divide.
Even here in Panama, where in places, it only takes a little over an hour to drive from 1 coast to the other, cichlid species are different on either coast, and never mix because of elevation restrictions. And if they don;t mix in nature, I figure getting them to mix in the confines of a tank, is remote.