Solar Garden border at Great Dixter, a house in Northiam, East Sussex, England - photo by Jonathan Buckley; Allium hollandicum ‘Purple Sensation’ with Campanula patula and Erysimum allionii in the Solar garden at Great Dixter
Pretty herb garden with Lavandula stoechas 'Pedunculata' Allium giganteum. purple fennel angelica and many more plants.flowers at the back of the herb garden don't need to be touched but look pretty and tall.
I'd use flowering shrubs rather than evergreens, a few different kinds, and arrange them in a reverse symmetry.] A long, thin garden with plenty of room for puppy to play and lots of privacy from the neighbours.