I agree it's commelia aka blue dayflower. I think they are pretty but they will grow in all directions, but is easy to pull up when needed. Nancy;

It would be lovely to see the bed in context, showing then entire length of the bed and its surroundings including the house, any trees, driveway and walkway locations, etc. If you stand opposite the front door about 15' out and then take a series of photos that overlap starting facing the left property line and then rotating and taking photos as you turn to end up facing the right property line. 2' wide (front to back depth) isn't deep enough to make an attractive arrangement IME. I originally had 4' beds, but they ended up looking far too narrow to look good with the house, and so now my narrowest beds are 6' and most are 8' or more. The depth gives room for shrubs to provide structure and winter interest at the back and then a combination of groundcovers, perennials, and bulbs toward the front. It is difficult to make a single straight line of plants look truly appealing IME. It may seem like that is overkill and will require many plants, but if you choose plants that are easily divided (like your hosta) or started from seed, the space will fill faster than you think. What is the shrub growing by the trellis?

you are in the tree forum ... frankly.. im not sure you have room for any trees .... you mention shrubs ... over time.. im not sure you have room for any shrubs that gain height ... as they will get too wide .. just as fast ... which adds up to me thinking.. you have a nice small space for perennials ... the easiest way to plan a garden.. is to be able to clearly define your goals ... what do you want to accomplish ... once you can define that.. then the plant options will follow .... sort of like.. build it.. and they will come.. lol ... also .... if you wander the area... perhaps you will see something that strikes you.. design-wise ... and you could snap a pic.. and one of the forums can help you ID the plants ... ken

'Nana' can be quite variable in form and it does assume a very conical appearance with age. Google some images and see. I would not immediately assume it was mislabeled....... 'Dwarf' in respect to conifers only means it grows more slowly than the species.