Hops- they grow extremely fast and look great.
One caution- I planted a wisteria on each side of a huge entry trellis and twelve years later its tree sized trunk is pulling down the side posts. It seems as the wisteria grows longer and thicker it grows shorter (like a snake strangeling its prey.) I like the wisteria but haven't figured out how to shorten the vertical posts to keep it from being pulled down.

I'd suggest hops too, but with one caution that most people aren't aware of. Hops are toxic to dogs. We grow and love Hops oursleves, but keep the doggies away.

I'm growing several kinds of grapes on mine. I prefer the combination of aesthetics and fruit!