I vote for clematis if you have shade from the afternoon sun and a trumpet vine if you have a location with hot afternoon sun. You can also grow an evergreen vine like ivy in a pot or a large leaf ivy-like plant called Algerian ivy. A rather unusual vine that does well for me in Zone 7 (Seattle area) is the chocolate akebia vine. It bloom in spring with dangling blossoms and a light fragrance. I do not recommend wisteria in a small space. Keep growing, Marianne Binetti