The screened lanai with no air in it

I already own this. Where should it go?

The same reasoning read backwards. Every spot you have marked, ranked against what this plant actually needs — including the answer that nowhere here suits it, which is cheaper to hear now than in three years.

You already own it

What have you got?

The classic answer to a sightline when there is no room for a hedge.

Nowhere on this property suits narrow upright evergreen screen. That is a real answer, not a failure to find one, and it is cheaper to hear it now than in three years.

What would have to change

About 3.1 moles a day short of the minimum, at the best spot on the plan. That is a geometry problem: something is standing between this place and the sky, and feeding it will not help.
The ground stays wet longer than this tolerates. Raising the root zone is usually cheaper and far more reliable than trying to make the ground below drain.
This spot stays wet well past what this group survives in winter.

Every spot on the plan, ranked

The table

wrong place

About 4.9 moles a day, against a minimum of 8 and an ideal of 22.

Light: This spot gives about 4.9 moles a day and this wants at least 8. It will live and it will not perform.
Moisture: This spot sits wetter than this group tolerates. Wet feet kill far more plants than cold does.
Hardiness: Zone 9.1 is outside this group's usual range of 5 to 9. Hardiness is a floor, not a plan.

This spot stays wet well past what this group survives in winter.

Examples of what this group covers, not recommendations: Columnar hornbeam; Italian cypress in mild dry climates; Upright yew in cool climates. What is right in one region is a weed in the next, and only a nursery that can see the site knows which.