Hmm, I have only seen julii, peppered, panda and bronze where I am, so I figured julii would be my best bet. I will ask the fish store if they could order in some pygmies. They are pretty cute. They'd be fine in my water hardness as well. I read that they spend a lot more time in the mid section of the tank though, which worries me, I wanted a bottom dweller.
I'm pretty sure my boy isn't aggressive, but he's not docile either. We had shrimp once, he didn't attack them, he just ignored them, so that's what I'm going off of. Of course it could be different with endlers, but I will just have to see :D