Hi Mary. A fellow 'sconnie, Norway spruce are among my very favorite species, and yes, yours look pretty good. If you or someone you know has a pole saw, it is amazing how much of an improvement in appearance can be made by an hour or two of work taking off dead branches within reach of the tool. It's easy and satisfying work with a great payoff. Other than that, about the only possible thing that could matter to these trees at this point would be to watch for dry conditions. As you state yourself to be in zone 4, methinks you are somewhere in the northern part of our state, which is still sadly missing nearly every storm system that comes through. But........keep in mind....this may not be necessary at all and if you do decide to water these trees, you really need to water a very large area under and around them. Glad you are so interested and knowledgeable about trees and their associates! +oM

Box elder grows in zones 3A to 8B so it is possible that this might grow in your area. Check searches using Acer negrundo. Box elder is listed as susceptible to Verticillium wilt and sensitive to pests/diseases.

And one last picture Not the clearest image of the leaves.. but I had to zoom in and take the picture from about 50 yards away

Consider Cotinus obovatus (American Smoke Tree) and Andropogon virginicus (Broomsedge Bluestem).