Several taller grasses come to mind. Erianthus ravennae, Miscanthus sp.

Remember that most taller grasses are going to provide seasonal screening. They should be cut back in early spring and will not provide tallest screening until fall, as they seed out.

My neighbor was going to give me some pampas grass that he recently purchased. Arer there different kinds of pampas grass or will they all grow tall and get plumes?
Is pompas grass the same as the Erianthus ravennae you were talking about?

A couple of thoughts...
1st - Miscanthus xgiganteus makes a solid, quick to grow, privacy shield. Mine, with flower, reach 12-14 feet. In the winter they add interest to the landscape.
2nd - Erianthus ravennae is NOT pampas grass. IÂve heard it called "hardy" pampas grass by some sellers but it is NOT Cortaderia selloana. Mine reaches four to five feet by the end of the summer. With flowers, it can reach eleven to twelve feet. IÂve attached my website. The picture of me on the ladder is with Erianthus ravennae. During the same time period the Miscanthus xgiganteus would be at least twice as tall, perhaps three times taller without flowers.
Both are beautiful ornamental grasses and can be used in most gardens or landscapes. Happy planting!
Gej

Here is a link that might be useful: Grasses & Gargoyles