So you want hens that lay well and can free range well, yet not attack the other chickens.
There is a reason why Rhode Island Reds and Barred Plymouth Rocks are some of the most popular breeds. Other good breeds would be Black Australorp, Buff Orpington, and Speckled Sussex.
Lately I have become interested in the Java breed. "Javas are heavy chickens, with roosters weighing around 9.5 pounds (4.3 kilos) and hens 6.5 to 7.5 pounds (2.9 to 3.4 kilos). Javas appear in three color variations today: Black, Mottled, and White. The Black has black shanks and beaks, though some yellow may appear in the legs. The Mottled and White have mostly yellow skin, with horn colored beaks. Hens lay a respectable amount of large, brown eggs and will go broody. Javas are particularly known as good foragers, needing less supplementary feed than many breeds when allowed to free range. Like many large breeds, they are known to be docile in temperament, and hardy in inclement weather. In general, Javas are particularly suitable for keepers of smaller flocks who require a good dual-purpose chicken."
If you want white eggs, I would suggest Brown Leghorns because they are better at free ranging than the White Leghorn because of their color.
