Supposedly some large oriental gamefowl (Shamo, Malay, Asil, Ga Noi, to name a few) will attack hawks, cats, and similar sized predators. Problem of course is that anything larger that has a mind to kill them will, and they are quite large and essentially flightless so cannot flee if they are unable to fight.
Bantams, American Pit Games, and anything else lightweight with large wings and little modernization will have better capability to flee predators but won't ever try to defend against or attack them.
American Pit Games would probably be my first choice if you are looking at predator issues alone. They're the closest thing to an undomesticated Junglefowl and have changed very little in the past 10,000 years. They will tame down readily, and shin flogging cocks are a rarity. They are excellent foragers (the only truly "excellent" forager I've ever seen; no other breed will compare) and if offered high roosts they will spend much of the day perched 4, 6, or even 8 feet off the ground. Of course there are cons; they are not that great of layers. The few hens who would class as a "good" or "average" layer would only class as such during spring and summer months; I wouldn't expect more than 100 or maybe 120 eggs a year out of an exceptional layer, and probably about 50 or maybe even 80 from an average one. That means that the breed as a whole would class as a poor layer, when compared to 300+ egg per year production Leghorns and Sex Links.
Other breeds to consider would include the Hamburg; they lay well but their eggs are small. They are beautiful but don't tame down with any sort of ease. They are OK foragers and have a decent capability to escape predators. The Fayoumi is another bird quite similar to the Hamburg, and in fact their qualities are near identical. They lay a few less eggs, though. Buttercups make a third option; I had one hen who was so wiley she slept in a tree in my run for 8 months straight simply because she refused to come indoors. This included most of the winter - lots of ~25 degree nights, a few windstorms that took out 100' tall trees, and even a quarter foot of snow one time.
