Always assuming its privacy your after, but you don't say what its for.
I think the best thing you can do, is go to a Garden Centre, maybe more than one, so you can compare answers, and explain to their experts what you want, and why.
Rose hedging is the best - something like Rosa Rugosa. We ordered 250 and it was delivered in a jiffy bag but grew like wildfire. It was also covered with lovely pink roses in the summer and rosehips later. Well worth buying probably from one of those catalogues you get in the weekend papers.
Good Luck