With that rooster, you will not get any buff colored chicks. I am assuming he has two copies of the Silver gene, based on both his appearance and what is normal in Light Brahmas even when they are poor quality. When he has two Silver genes, he gives one to each chick. Because Silver is dominant over gold, no chicks will show gold, not even when their mother does. The gold gene is needed for buff chickens, and also for gold or red chickens.
You could hatch eggs from the buff or gold hens, then keep one of the males.
Use that new male with the buff or gold hens, and you should get some chicks that show buff or gold and some that show silver. Use that same new male on your Light Brahma hen and you should get some daughters that show buff or gold and some that show silver, but all sons will show silver.
The White Leghorn hen will give white chicks with any rooster, no matter what color the rooster is.
The blue hen and the hen that is mostly black, I don't know for sure if they can give chicks other than black or blue. If they give chicks with lots of Silver (white) from this rooster, then they could give chicks with lots of buff or gold when bred to a rooster that has the gold gene (like a son of a gold hen.)