I wish one of my hens would go broody.Out of my 3 oldest only one has ever gone broody and that's been a few years. I kinda miss my game chickens.
My Dels don't go broody, but my EE's and Marans do. I have one Light Sussex hen who goes broody too. You only need a couple hens.
I like my Lt. Sussex. Big Delores we call her. I expect a RIR rooster over a lt.. Sussex would be the same as a RIR rooster over a Delaware and give you sex linked chicks.