bolivian ram questions

[dogdoc]

Hello
Have a semi-mature ram that I've had for a couple of months. Initially thinking it was male. Recently went and got another, smaller ram hoping it was female. Now I think I have had it backwards and the original ram was female. I'm hoping to establish a pair. Older fish bullied new fish into hiding and stress colors. I would like the original ( my favorite) to pair up. I re-arranged the decorations somewhat, and added third ram ( also smaller than the original). I'm hoping the original is female, and will 'pick' one of these two males to pair with. I will return one of the supposed males to the LFS if she does. In the meantime the original fish hates them both ( has only been a couple of days though), and is chasing them non-stop, but not inflicting any physical damage...so far.

I was hoping someone could tell me if I'm right in the sexing of them, and also how long should I give them before I put the more immature fish out of their misery and take them back to the LFS. One is currently hiding in one corner of the tank, and the other in the other corner. Meanwhile the largest he/she fish has all the remaining tank :(

[dogdoc]

The largest fish in the first picture is the original ( and favorite) fish. The other two are the additions that are being harassed. I suspect the first is female, and the other two are immature males. Anyone with more experience that me comment on this please.
Thanks