Bird's Nest Spruce (Picea Abies "Nidiformis") - a slow growing flat topped dwarf well suited to rock gardens and hardiness zones 3-8. Be a nice compliment to the ball shaped shrub and the creeper. Mine seems to "expand" maybe a scant inch per year so one would never block your view out over the garden. It's a charming conifer.

Is the old juniper stump going to be ground/dug out?

yes it will and thanks for the advice...