I recommend Welsummers and Welbars (basically a Crele colored Welsummer). They are tall (imposing) and fast (not overly heavy), and they are beautiful too. I've never had one attack me, though one of my customers returned a young roo that was acting too aggressive.
Overall, I think the exact breed matters less than how you raise them. If you live in a very cold area, I would avoid those with huge combs, like the Mediteranian breeds, because they suffer a lot from frostbitten combs.
Overall, I think the exact breed matters less than how you raise them. If you live in a very cold area, I would avoid those with huge combs, like the Mediteranian breeds, because they suffer a lot from frostbitten combs.