P4 Nude Woman (Posette) and NearMe.  I have some animals, mostly dinosaurs, that I bought years ago but have not used much beyond seeing what they looked like and how they posed.

Since you are new, I will mention that some objects are classified as figures also, not just organics and robots.  I have a wresling ring by Pandorian, classified as a figure, that I use.

These are not at all "required," but here are the links so you can just look if you want. :)

NearMe:  http://www.contentparadise.com/productdetails.aspx?pid=9516

Ring: http://www.renderosity.com/mod/bcs/pandorians-wrestling-ring---gen-2/47258/