Will deer be a problem? If so you need to rethink many of your choices, especially the dogwoods, Rose of Sharon, Rhododendron, Azaleas, and Oakleaf Hydrangea. Many of the others I can't read, so I can't comment on the deer resistance, but the aforementioned are great favorites.

There are innumerable texts from garden designers out there, some of them are excellent. Your first principle is height - shrubs shouldn't block things behind them for more than a few degrees of view plane. You can group if you wish, but this is for views from far away (more than, say, 50'). Shrubs and trees are the skeleton upon which you build the rest of your garden. Dan

Paniculatas would be fine in full sun, and there are a number of lovely cultivars to choose from. Also stunning would be some viburnums--you'd have berries in late summer. My favorites are the tea viburnums--V. setigerum. No named cultivars, but you still need more than one for proper pollination. V. setigerum gets about 10-12 feet tall, is narrow, but tends to get naked about the knees as it ages, so something lower (4-5 feet)in front works well. Also nice are V. dilataum 'Cardinal Candy'; they'll need a pollinator too, and V. dilataum 'Asian Beauty' makes a good one. Another stunner for late summer is Seven son flower--Heptacodium miconioides--a small tree. Look for older posts discussing this plant.

Dogwoods don't like to have the trunk exposed and - yes - Kousa in particular tends to be low forking - at least in the open (this is true of many other small- or comparatively small-growing kinds of trees also). Plus Kousa is a bark interest tree, when bark interest trees are grown with single trunks the bark effect is not as good. With that fence there the straight lines and full length or nearly full length repetition of some of the plants in these schemes kind of makes the whole look like a billboard. Your best bet might be to follow the paid for design - but using instead one each of four different kinds of trees, chosen to contrast or harmonize with the particular kinds of shrubs that are directly in front of them. Also the whole would look softer and more fully realized if flowering climbers (clematis, honeysuckle, roses...) were trained onto the fence. Again choosing ones that had some kind of specific visual interaction with the shrubs in front of them. Even as comparatively fancy as it is the fence - it is just as fence, after all - still does not have enough interest of its own for a lot of it to be visible. And it is being used in this arrangement as a backdrop. Plus the lattice like style of it seems as though intended to serve as a support for climbing plants. So it looks unfulfilled without anything growing on it.