Don't waste your eggs leaving them to try to entice a hen into brooding. If you want to leave something as a visual hormone trigger, (yes, sometimes that really does help, but don't count on it) get some wooden or ceramic eggs, or some golf balls. My dad used to use ping pong balls, but I'd think a little weight in them makes them more believable to a hen. Or put melted paraffin (for weight) in empty plastic Easter eggs and glue them shut.
Anyway, there are a lot a really broody breeds, not just silkies. I don't like silkies myself, and have never had any of them, but I have FIVE broody hens right now. Two dark Cornish (great moms!) and 3 mixed breeds. The mixes are combos of light Brahma,(more really terrific moms) buff Brahma, dark Cornish, and Australorp. Cochins are good moms, as are many kinds of bantams.
RIR's rarely brood, but when they do, they're usually good moms. Your Barred Rock might brood. Many say Orpingtons brood a lot, but mine haven't, except one or two, long, long, ago. Australorps can be broody, too, but you can't beat a dark Cornish as a mom. Much better at staying on the correct nest than the Brahmas! The Brahmas are dedicated, but easily confused.