Here is a great tree that will not only give shade but is beautiful at the same time. The Tabebuia Ipe is becoming popular again for many reasons.

The Tabebuia Ipe or Pink Trumpet tree makes a nice patio tree, meaning the root system is not aggressive in confined areas.
It has great flowers in February when not much else is blooming.
In our area the tree is semi evergreen. I find that often time the tree drops its leaves as the flowers come out. Therefore it almost always has some leaves or flowers on it.
The Tabebuia flowers are not sticky and messy like the Jacarandas that are blooming now, in May and June.
If you prune the tree carefully every other year or as needed, you can easily keep it in the shape you want.