I am sorry for this delayed reply to your gardening question as we are transitioning to a new Q&A system. I hope this reply is not too late to be of help.
Florida anise may be okay for you as it reaches about 10 feet but you'll need to do some shearing to keep it dense as a screen plant. Another choice is Bright N Tight Carolina laurel (cherry laurel). It grows to 8 to 10 feet tall and makes a good screen.
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