(Part of what I was getting at with the Florence Nightingale allusion: statistician and health reformer, rather than Angel of Scutari.)

ningloreth has Fourth Age Eowyn as a detective rather in Brother Cadfael mode (at Eryn Carantaur) - that's rather fun too, although her 'ship is Legolas/Eowyn, so very AU in that sense and thus might not be your cup of tea...