As far as more recently recorded descendants, don't forget that the Gemara (Gitin 57b) says that Haman's descendants taught Torah in Bnei Brak (or small children, depending on which version you follow).
Although our texts do not reveal who these descendants of Haman and Sisera were, the text available to the early commentators apparently did. The descendant of Sisera was Rebbi Akiva, and the descendant of Haman was Rav Shmuel bar Shelas1, a contemporary of Rav (Ein Yakov to Sanhedrin 96b2; Toldot Tana'im v'Amora'im; Sefer Yuchasin; Menoras ha'Ma'or 5:3:2:3).
Ok, so not as recent as one might like, but still...
1: Others reverse the descendants, and say that Rabbi Akiva was descended from Haman instead. No concrete source on this, yet. Just internet musings.
2: Right at the top right.