By blocking sight lines with a tall plant, you create a sense that a yard is bigger than it is. The tall spray of a robust tropical, such as this ornamental ginger (which will have to winter indoors in some areas), also makes the path it sits alongside feel more enclosed and intimate.
or try this:
Use a multistemmed birch,
a giant ornamental grass, or a flowering tropical, such as a canna lily.
If the pot is distinctive enough, you could even leave it unplanted as a piece of sculpture.