<p>I think all of the schools you suggested are excellent. :)</p>
<p>I would suggest GWU or Georgetown (if you have the stats) these schools are located in the best place to make change. A lot of the students find jobs with NGOs and other organizations with other classmates.</p>
<p>I know that Georgetown places a very big emphasis on making a difference in any way possible. The only thing might be that they are a little bit larger than you want, but if you are okay with that you should definitely look into them. :)</p>