Think about creating your screen with several different types of trees, both fast and slow growing, both evergreen and deciduous, and both tree and shrub form.
This way you can benefit from the qualities of all types, and you don't have to worry about a certain pest or disease wiping out your whole screen. As the fast growing trees die off the slow growing trees will be filling in, the shrubs will fill the lower areas as the trees get tall and lose the lower limbs. You can also have different interesting things going on at all times, flowers, cones, berries, interesting structural forms, different colors, etc.
I offer this advice from experience. My childhood home had such a screen installed by the village. They planted a wall of mostly native plants. They used a large variety of stock including Larch, a deciduous conifer with beautiful fall color, Highbush cranberry, a very fast growing bush with bright red berries that birds love, Sycamore, a very interesting tree because of it's bark, and other great plants.
It made an almost instant screen and still looks good, thirty some years latter. Some of the plants have not done well, but others have filled in. In some areas, buckthorne, a nasty invasive tree, has taken over and started to ruin the screen, but a homeowner could control that.
If you could afford a landscape architect, that would be best, otherwise, look for a planting like I described, one that you like with a diversity of plants, and copy it. One goal should be to have it look natural, like it occurred naturally. That's one thing a row of lombardies will never do
