Etsy seller 7CardinalSins creates some really nice custom action figures. Among the best are these fantastic Doctor Who custom figures. In his shop you will find the very nicely detailed TARDIS console seen here, the second Doctor, Omega, a Rutan(Enemy of the mighty Sontarans), a Silurian and even the 10th Doctor done up in the Simpsons style.
They hit all of the right details and would look amazing with all of your other figures. In fact, they might make some of your other figures look a bit shabby. Omega and the Silurian look especially awesome. Just throw your money at them quick before they disappear.