Really...Cleveland pear?
There are enough invasive calleryana trees without anyone ever intentionally planting another one. Even in your yard.
Consider some natives, like Allegheny or apple serviceberry, American smoketree(not Eurasian smokebush), American yellowwood, American fringe tree, in addition to the sweetbay magnolia. Depending on your location, the Jap. maple may or may not be suitable.
We started with a blank slate...included the above(and others), but planted lots of bur & bur-hybrid oaks, pecans, shagbark hickories, and fruiting mulberry selections. We WANTED fruit/nut-producing shade trees!