I am looking for a tree? I am looking for two small-medium size trees for my backyard. I...

I am looking for two small-medium size trees for my backyard. I would like something to be precise not too big in point (possibly around 20' tall, and 10' wide-ranging at most). I was considering Flowering Plum trees, but am told they are messy. This is a south facing courtyard, and they will be in full sun. Any angelic trees I should consider?
What are apt plants that help yourself to...
Answers:    Any tree that blooms is messy for a week or so when the blossoms fall. Flowering plums do sometimes enjoy fruit, but they are small and soon disappear. Other suggestions might be redbud, or whitebud, same tree, different color blooms: Magnolia soulangeana; stellar magnolia; Flowering crab (Prariefire is great); Washington Hawthorn or one of the other hawthorns; smoke tree; Japanese maple, one that has widespread leaves, there are some without doubt gorgeous varieties; if you are far satisfactory south, crape myrtle trees (don't try to grow these north of zone 6, you will just own bushes). I think maybe 10' wide is mortal a little unrealistic, I don't muse you are going to find anything that narrow unless you stir with one of the junipers that are soaring and very skinny.

Dogwoods don't approaching sun, they are an understory tree that needs shade from around 11am-3pm.
Avacado Pit?
see lf you can find a greenhouse and look around in at hand and see lf you can find one.. they probably do