I need your help with planning a formal garden in my back yard. It feels like there's too much going on and I need to simplify. But I'm not sure how to do it.

I have a small space, roughly 64 feet long and 22 feet wide. The yard is next to my driveway/garage. The whole area is surrounded by an 8-foot-tall fence. Exposure is west. I have no existing trees or shrubs back there.

I'm trying to create some height (besides the fence) that looks natural. I was thinking of using Ilex "Sky Pencil" or a thin juniper (maybe "Skyrocket" or "Blue Arrow") in singles or in pairs every 6 or 8 feet or so along the fence line that's next to grass and some evergreen vine on the fenceline across the way next to the driveway (too narrow for any shrub).

I also like the idea of an allee of a fruit tree, chokecherry or some sort of standard down the middle of the yard, with roses in between or on the inner side of the trees. The area I'd have for this allee would be about 21-22 feet long. The pathway would end in an arch leading to a patio area next to the side of the garage. I'd set a pair of the "exclamation" shrubs at the entrance (either centered at the sides of the arbor or on the corner of the patio area) and have a corresponding set mirroring on the other side of the patio.

The area near the house would be divided into a small sitting area surrounded in roses (I have a lot of roses to use) and an entry area leading to the back door.

However, all of this is compounded by my crap clay soil that's nearly impossible to dig into. It took me about an hour to dig out a foot and a half of grass. So I need raised beds.

How is this all possible to do with raised beds? Should the shrubs along the fence stop when the allee starts? How can I create consistency and repetition while still having some variety? What in this plan needs to go (all of it)?

Thanks in advance for the perspective.