Just another update:
The 2 Bolivians are still defending their turf. And I do believe that I did see eggs being moved by the 2. But one thing is strange, and that is the only fish that isn't bothered are the German Blue Rams. All the other fish get chased away, even all the cories now. But the GBR's mingle with them no problem. How can this be? This is getting stranger by the minute.
Also, after seeing the GBR's this morning, I'm now not so sure I have all 1 sex. The 2 more colorful ones looked like they were doing some kind of a ritual, and the 3rd one was watching. They were side-by-side, doing kind of a wiggle type of dance or something, facing the opposite directions so the mouth of one fish was tapping the other fish's tail. Kind of hard to describe, but I've never seen that before from them. I'm going to have to use my new camera one of these days and get some real close-ups, to see if others can tell whether they may be males or females, or both. But it was quite the interesting ritual this morning, lasted a good 20 minutes or so.