Here is a Magnificent Lady of Titanic's era: Frances, Countess of Warwick, society favorite, politician, former mistress of the Prince of Wales. She was close with at least two Titanic passengers - W.T. Stead, of whom she was an outspoken supporter, and Lucy Duff Gordon, by whom she was exclusively dressed. This image, from the National Portrait Gallery (London), shows the Countess in 1898 wearing a "Lucile" evening gown.
(Image Deleted: Sorry Randy, I know for a fact that the NPG charge £100 per year for the use of their images on the web. I have tried in the past. Please only post images if you can confirm that you have permission to do so. ed.)