I've never had a Buff Orpington go broody, either, even though 'everyone' says they are good broodies! I did have a Buff Wyandotte go broody, though, and strongly suspect she had some Buff Orpington in her ancestry, because she had white skin and legs (Wyandottes are supposed to have yellow skin). I think I got the Buff Wyandottes from Privett hatchery, but you'd have to check and see if they still sell them.
I've had several Easter Eggers go broody, even though the breed descriptions usually say they won't. One of the best broodies I've had was half Easter Egger and half Silkie, and then her daughter, who was 3/4 EE, was also a good broody hen. The crosses will have a bit of feathering on their legs, but they don't have feathered feet like Silkies do. I don't know if the crosses will always have normal feathers, but mine did, and I think that's preferable -- they handle weather better, and I think it's also helpful for covering a clutch of eggs. Both of my cross hens were about half-way in size between a Silkie and Easter Egger, and laid small eggs (but not tiny).
Right now I've got Icelandics, and have had several of them go broody; the fact that they go broody was one of the main reasons I decided to get Icies, because they are also good layers.
Personally I don't care much for the feather-footed chickens, because in snow they get ice balls on their feet, and in mud they are just a mess and have to be kept inside (and I prefer my chickens to be free-range as much as possible). But in some situations they are fine, they just take a little more care.