Wow thanks for giving the prize to a non-Okie....
Only difference I see between your Copper Maran and the one in the photo is that yours has black coloring in it's legs whereas that one has white/pearl legs.
HOWEVER. Marans legs can vary according to Feathersite's photos.
#1 looks like a Blue Sumatra...
Lemme do some looking around for the other two! lol!
I doubt they're Dorkings because of the shank coloring. Dorkings have pale/pearl legs while your birds have blue/ black leg coloring.
I'm thinking #3 is a Copper Maran.
Still looking up #2.
OK...finally...