Excellent painting.
I love these figures and bought a huge amount when Foundry restructured in the mid 90's. Some of you may recall that they ran a big sale on the ranges that they were discontinuing back then.
If your looking for a good match for these try Old Glory and Knuckleduster.
A lot of people don't care for Old Glory, but I can tell you that the 1812 line is among their finest sculpts that they have ever done. They are as good as Foundry and match perfectly. I am a big fan of good sculpting and Old Glory certainly has their share of strange poses and figures. But not the 1812 line. It is exceptional.
The only complaint I have heard is that some of the older packs that were cast as the molds were wearing out, are full of flash.
The figures that I have are fine, but perhaps check with OG to see when the molds were replaced, if you decide to try them.
Old Glory Woodlands Indians fro thier F&I War range offer plenty of possibilities.
The other line is Knuckleduster and the are wonderful figures also. And a good match size wise for Foundry. The line is well sculpted and cast and there are a dozens or so packs to choose from. An excellent company to deal with.
Perry AWI riflemen are 12 more sculpts that would fit in nicely.
And finally, Kings Mountain Minis makes Over Mountain Men that are frontiersmen that come with seperate heads so that you can create your own poses or units. The owner is a cranky old git, though.
Naw, I'm the owner. And I use the Over Mt Men from everything from F&I War right up till the Alamo.