This question has been asked numerous times on this website and usually with a list of specific trees. One can only wonder how frustrating it then becomes for the original poster to search in vain for what are excellent suggestions, but not readily available.

Let me answer your question with some suggestions instead.

Start with the local nurseries and big box stores. See what they have to offer. Next, do some research - how tall will they grow? Are they invasive? Are they truly evergreen where you live? What do they poop - fruit, flowers, seeds, leaves, branches? How much water do they need? Learn as much as you can about those trees and your selection becomes much easier.

Keep in mind that most nurseries and the big box stores can order a specific tree for you as well.

I like a magnolia for sun blocking. --Papa Jim

Papa Jim....ironically enough I had planted a magnolia in the very spot where I wanted my shade tree to be about eight years ago. In all this time over those eight years (and I am not exaggerating) that magnolia has not grown a single inch. Weirdest thing ever. It looks healthy and blooms every year but doesn't get any taller (about four feet in height). Anyway..the plan is to transplant the "mini magnolia" to another spot and put a new shade tree in its place. Cheers.