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'm afraid I'm a bit out of that climate range. Hopefully someone from a similar climate will chip in with some suggestions. Although one suggestion, if you ever listen to your local ABC Gardener on the radio you can ring in and ask the question there.

Quercus coccinea and Quercus rubra are red in the Fall, not all year. Fall color in oaks varies a lot from individual to individual. If you want Fall color, buy your tree in the Fall and look at it. Quercus coccinea is the oak with the best chance of having good red Fall color. It is short lived...for an oak. (It will still likely outlive you). Likes dry sandy soil, hard to transplant. Fairly salt tolerant. Doesn't like wet feet. Reports differ as to whether the number two spot for Fall color in an oak goes to Northern Red Oak (Quercus rubra) or white oak (Quercus alba). Both pretty salt tolerant, red oak probably more so. Red oak transplants more easily and grows faster, white oak is longer lived and more disease resistant. Occasionally has red leaves briefly in Sprng. Tupelo (Nyssa sylvatica) also has great red Fall color and is known for having Fall color in areas that are usually too warm for fall color. Should tolerate any conditions a sycamore can. Bur Oak (Quercus macrocarpa) tends not to have good Fall color but tolerates alkaline soil. I will agree with floral_uk z.8/9...beeches in general are among my favorite trees. Copper ones are awesome. Out of curiosity, what didn't you like about sycamore?

>The London Plane around here is a perfect sized tree for our yard< And the size they are now is? If you are thinking in terms of an eventual 50 ft average crown spread your space is not big enough for this tree. For instance one in Seattle (USDA 8) was over 100 ft. wide in 2005. >I’ve been under them a lot and have never noticed them being covered in irritant hairs!< stiff hairs shed by the young leaves and the dispersing seeds; these are an irritant if breathed in, and can exacerbate breathing difficulties for people with asthma The large amount of leaf drop in winter and small hairs on the under leaf can cause irritation. The ball of tiny flowers matures to a dry seed head (the 'itchy ball') that when broken up and brought into contact with the skin, causes severe itchiness. it has a number of problems in urban use, most notably the short, stiff hairs shed by the young leaves and the dispersing seeds; these are an irritant if breathed in, and can exacerbate breathing difficulties for people with asthma Attention should be paid to the location of planting, as the hairs on the leaves can cause irritation to some people's noses. The foliage of all [Platanus]species is pubescent (hairy) and these hairs can become a skin or breathing irritant. Hairs from seeds and leaves are also released in spring and can be a source of intense irritation. The seeds and hairs are dispersed into the air by wind or vectors, such as birds, butterflies and bees, or from people pruning branches and raking leaves. https://www.bing.com/search?pc=COSP&ptag=N1140D060418AE20BDC3E2E&form=CONBDF&conlogo=CT3210127&q=platanus+irritant+hairs https://www.gardenweb.com/discussions/1713810/do-i-really-want-a-sycamore-tree#n=15