Sexing uncommon rainbows

[Potluck]

So as you all know I've gotten more rainbows around Thanksgiving and I think they are all Females but I'm not sure so maybe someone can help, the pictures besides the boseman (male) are the ones I need help with (sentani, kangaroo creek and a parva in the last picture), my boseman Colored up pretty nicely after switching to NLS flake and a more balanced diet I just don't get why he's so big around

Sexing rainbows https://imgur.com/a/10XGh

 

[Delapool]

Did you find out? Can't help but was curious.

 

[Potluck]

No sure haven't I looked up pics the males always are brighter but that's all I can go by right now so it looks as if I got all Females