How about Coretta Scott King? She died recently. Rabbi mentioned her during Friday night Shabbat service not long after she died. He had nothing but good to say about her and when we were to remember those who had passed on, Rabbi added her name to the list.

http://www.thekingcenter.org/csk/bio.html

Coretta did a lot. I would call her a good Christian. But, more importantly, I would call her a good person.

If you mention her, you must also mention Martin Luther King, Jr.

Rabbi Nehorai said, "Leave home and go to a place of Torah. Don't say that Torah will come to you or that your companions will make it yours. Don't depend on your own understanding." ~ Pirket Avot 4:14