It depends on your goals.
Coloration of your cockerel (with barring)
Your cockerel (without barring)
Red (without barring)
Red (with barring)
(Not my pics)
All of these roosters are pure for the gold gene. Barring is dominant, so if you cull all the chickens you have with barring, it...
If you want some of the coloring of the top bird, you’re going to have to breed forward some of the birds with barring (without barring, the top bird looks just like a Hoover “rainbow”).
That last one actually looks like a pullet to me (though I could be wrong). I agree with @NatJ that the first one is likely a cockerel. 2nd also looks like a pullet.
You want the bumpy rose comb? If you haven’t got one like that yet it’s probably because that wyandotte hasn’t passed on the gene to her offspring. It’s just a variation of the rose comb.
You could keep a couple Brahma mix pullets instead of the Brahma mix cockerel. They should all have the same potential to have penciled offspring, since they’re all first generation Brahma crosses.
I’ll try to give you the breeding possibilities for these birds.
1- a black pullet with the silver gene
2- a blue silver/gold split single barred cockerel
3- a single barred black cockerel, not sure if he’s pure for silver (silver/silver) or silver/gold
4- a blue pullet, not sure if she’s...