I think you may be able to do this if you have 3 distinct sections to the tank with limited line of sight between sections. It is then going to depend upon the males and how tolerant they are of other males. I'm pretty sure you could do this with A. cacatuoides or A. borellii, again others may have other species in mind that will, or definitely won't, work.I want a single species with multiple males supporting harems.
No, you can be pretty sure the male will mate with all the available females (other than in the exclusively pair forming species, should they exist). The number of males you can keep will be limited by how dominant the dominant male is. If it is an aggressive species, or there is insufficient cover, the dominant male will sequester all the females, and relentlessly hunt down the other males as soon as they leave the upper portions of the tank. The problem then is even if the dominant male doesn't kill the sub-dominants out-right their lives are likely to be short, bloody and stress filled....... I would hate to waste a lot of money on the fish and the male only spawn with one female.
You would almost certainly be successful with 2 or 3 domestic male A. cacatuoides, most of their display is just bluff, and it rarely develops into serious fighting. I kept "Steel-Blue" for a while and in their case the dominant male was absolutely relentless in his pursuit of the sub-dominant, and if he caught up with him, he would go full-out to inflict as much damage as possible.but how do you think cacatuoides would do