I need advice on a privacy hedge for my back yard.

I need privacy from my neighbors and I have a shallow backyard. I
would like an evergreen hedge that is 10 feet tall but no more than 4
feet wide. Of course I'd like something fast growing. Does anyone
have any better ideas then Arborvitae Hedge ' Emerald Green'? I am
not a huge fan but don't anything else. I love hollies, but do they
grow fast and are there any tall and narrow varieties?

Thanks,

Phil