I have found great success in Central Oklahoma with Wyandotte. I have several color varieties. They are a dual purpose heritage breed...egg layers and meat producers.
The hens lay 3 to 5 eggs a week each even in winter. The meat is plump and succulent with great feed conversion.
Selection of breeders is very important like
@GaryDean26 reported.
I also select for good mothering...I like to see that Mom out with her clutch teaching her bitties how to hunt and select food while free-ranging. I also want hens that accept newly incubated chicks added to their clutch.
In my layer flock I also have a few Cochin, Marans, Orpington, and Bantams. They each serve a purpose.
My oldest hen is a Black Minorca and at 8 years of age, I get one giant white egg once in a while. She earns her keep by regularly adopting stray chicks and nurturing them.