[Wavytone]

Best is trachelospermum - native jasmine. It needs support to climb - lattice or wires are fine - and won’t damage walls or paint. Evergreen with shiny deep green leaves, likes sun and is tough.

It’s a bit late to start but keep the water up to it for a month and it will grow fast - you could have some cover by January. The tendrils are capable of 0.5 metre per day in early spring with rain.

After rain it usually flowers -little white stars, which give a nice perfume in the evenings.

Only thing to note is that it needs a haircut 2-3 times a year - cut off the straggly bits to keep it looking good.

If you change your mind it’s easily removed no issues.

In addition it sounds like you could use a few trees for long term shade but they take longer.