Here are 3 birds for you that I have chosen to observe and cross. The bielefelder. the blue orpington, and the belgium malines. The english crele orpington might give you some more thought about color as well. Each of these meet your egg and meat specifics. Forget getting hens to weigh 8-10 pounds! Raise turkeys instead. You surely can get some roosters to meet that weight, but most likely, not the hens.
There are mini turkey breeds too, but I have no experience with them.
As per 8-10 lbs per rooster...not sure how tender it would be at that point. Still, if you don't mind slow cooking or canning the meat, those are good options for roosters.
I had a couple of Malines cockerels that were 7 lbs dressed at 19 weeks of age. Can't complain!
I agree with Our Roost...hens not likely to get that big in breeds he listed.
Good layers they are, but don't these birds lay beige eggs? I would keep 2-3 hens but egg color must be different enough, so that I don't hatch their eggs with my Malines.

