I would look at personality first, mostly because I refuse to have a human aggressive rooster...
Also, I would lock up the chickens until the hawk move on... or put up a huge amount of hawk deterrent items like fishing line with surveyor's tape and CD's flapping off of it, as well as tables or other cover for the birds to hide under.
I haven't ever had a chicken or rooster be anything helpful against a hawk or other raptor.
A flock of geese now, say 6, that works.
Also, a good flock of muscovy can hold their own against the smaller hawks, but will be taken out by eagles.