Three companies you must know about if this is your interest (if you don't already): Blue Moon Manufacturing (Deep Dark Africa, Horror ranges both have lots of great figures - and a designed Sherlock Holmes figure), Rebel Minis - they have an actual Pulp range (hoping for more in their Steampunk vein), and Khurasan (lots of stuff). I own Blue Moon and Rebel and they work together fine. Don't yet have Khurasan. Another company for animals is Splintered Light Miniatures. Then there is Musket Miniatures (look at their animals in their HO range, a bit large for 15 mm but the above mentioned ranges are all pretty large 15s (17-18 really). And Irregular Miniatures out of the UK, their colonial range in particular, has quite a few useful figures and look at their animal range and their stone age range (forget what its called).
Went and looked at the links - Brigade Games still has two packs that have an Indiana Jones like figure and a Geisha and some other useful figures. Also, both Blue Moon and Irregular have World One ranges with some useful vehicles for converting - or maybe even using as is.
Would love to see more focus in this area. I keep hoping to see someone putting out a range of 15 mm steam traction engines, historical ones. Especially like it if they do it in 'kit' form so we can build a variety of items. If anyone out there is giving it consideration, I'd be happy to correspond as on the matter.
Will probably buy some of the figures in the photo at the top of this link; always like to add cool civilians to my mix.