I'd go with Dave's call here but also add that there are many different cultivars of the Colorado Blue Spruce in addition to the straight species. You could encounter some of these at your nursery so, before you go, you might check out this reference (link) and select some from the pull down menu to brush up on possible selections. The typical Colorado Blue can get to be a big tree over time and if space is a problem in your yard, you may want to investigate dwarf or intermediate sized trees, weeping, prostrate or fastigiate forms. I'm sure you will find something to fit your site and budget. Here is a link that might be useful: Picea pungens cultivars

Thanks a bunch Pjtexgirlcolor> for your extraordinary sharp vision. I am so tickled to have him identified and look forward to seeing more of him! Supannee

Green Ash (Fraxinus pennsylvanica), the broken top was likely from last fall's early snowfall, and Emerald Ash Borer is unlikely to ever get to, let alone establish in Calgary.

The first one is Carolina laurel cherry -- Prunus caroliniana. A beautiful evergreen tree that some consider to volunteer a bit too readily (spread by bird poop). I'm growing it in my yard, but it's not as common up here. Have no idea on the deciduous one.