I have a bare corner between the house, fence and the edge of a raised bed. It's concrete so needs something in a container - probably a 50cm container is the best fit. It doesn't get much sun at all.
I would love something that will grow reasonably tall (a metre or so at least), ideally perennial. Also needs to be non-toxic for cats. Flowers are a plus but something with just impressive foliage will do as well.