From my own experience, if they´re real endlers, they don´t really have to be at a 1m: 2f or 1m:3f ratio. Not all livebearers should be kept at a ratio with more females than males. Real endlers are doing fine as well at a 1m:1f ratio or even with more males than females. Same goes for wild guppies. Hyrbid endlers are a bit more tricky. It depends, do they tend to have the guppy (male fancy guppies harass females more than male wild guppies) or endler behavior?
If the space in a tank is not sufficient, the harassment of the males towards the females "can" become more.
I do have multiple tanks where the livebearer ratio counts more males than females. And it's harmony in those tanks. You just need to know what to do, what kind of livebearer it concerns and will the space in the tank (includes decorations, plants or whatever) be sufficient that the harassment won't be triggered that much.
Just a general note overhere:
It would be an incorrect information to say that more females should be around than males at all times as a steady rule for all livebearers. For that would mean that there's a lack of knowledge when it comes to the livebearer knowledge. For most people only refer to the "Big 4", which refers to the guppy, molly, swordtail and platy. There are way more livebearers with other needs, care and behavior. And even within the Big 4, there are a number of strains that will be different in needs, care and behavior as well. Especially, when people are used to the commercial livebearers, I do understand why they may think differently.
