Ruby is the only questionable one... leaning toward pullet, but not sure.
All the others look like pullets. Lad has a bit of an odd looking comb, but still pale, so female.
The green feather sheen is called iridescence. Both male and females can have that, although roosters tend to have more. Makes them flashy! Australorps have full body iridescence, even the hens. Very pretty for an all black bird.
And possible Welsummers... my two are very loud, so if the one with its mouth wide open is hollering, she probably is a Welsummer.

Appreciate you taking such good pics, especially of the combs which are hard to get!