Having only kept 5 of the 20 species in the genus, it would be hard to truly rate aggression in the ones I haven't kept.
Having said that I have never found any to be overly more aggressive than any other cichlid, in the proper size tanks.
I kept A"amarillo in cichlid communities until mature, but that's how I handle most species, once mature a pair always seem to need their own 6 ft tank.

Young amarillo above in a community, below mature.

I suppose A trimaculatus could be considered up a the top of the aggression scale, but again I gave a pair a 150 gal to themselves..

A flaveolus below, as you can see divider added.

A lyons i seems to me the least aggressive

I also kept mid-evils early on, and never found them overly aggressive except when crammed in too, small tanks, which is the whole caveat with cichlids, I don't believe any are overly aggressive if kept in properly sized tanks, unless of course they have evolved to be the only cichlid in their habitat. Those loner types defy all boundaries.