I lived in Tripoli, Libya as a child. Really sad to see what's happening over there.
Anyhow, it's less about your passport (what you are "officially") and more about what you talk about in your essays and interviews. In other words, "diversity" isn't just about your official demographics (gender, nationality, etc.) and more about your own experiences which are a reflection of your culture and interests.
In other words, it's about what you as an individual bring to the table in terms of your experiences. Whether they like you more or like you less has little to do with what you put down as your nationality in the application form, and far more to do with what you talk about in your essays in terms of your own experiences and perspectives as an individual. Remember, they're wanting to bring in diverse INDIVIDUALS, not diverse passports.
In any case, it sounds like you've got a good range of schools - you seem to have chosen a mix of stretches, sweet spots, and safeties (given your list, you know what they are, so no need to ask to reaffirm). It's now just a matter of focusing on doing the best you can on the applications -- and hopefully you'll have a reasonable shot of getting in somewhere.
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