Im surprised that nobody mentioned Cobblestone's female Northland/Barbarian miniatures, very nicely sculpted. Two of the 5 female miniatures are topless. Cobblestones are probably the best female 15mm miniatures out there, all 5 of them.
Museum has a few female greeks that are nude, really old, not well sculpted sculpts, and a couple new digital "Z" sculpts, a couple topless (Indian Maidens). Hope Museum miniatures keeps up with the new "Z" line and adds some more female to the mix. Would really like a Amazon range added to the mix.
Of coarse, there is a kickstarter for Battlevalor that has some amazons, but the quality of the sculpts looks like they are going to be quite on the low end of the quality scale but there will a quanity of sculpts when they come out. Will probably buy a few, but will be disappointed in them.
Didn't know about Outposts Maiden guards. but the point is, the pickings are VERY Slim.
To try to put together any Amazon type Army is almost impossible, expecially if you want sculpts you dont have to hold at arms legnth.
Lone Gunman's Amazon Range is missing the best model that was sculpted for it, the one with the Spear, maybe those molds got ruined? not sure.
There are also 2 or three really nicely sculpted 15mm miniatuers in Khurasan's Miniature line, sculpted by Tom Meyers. they look very nice also, Think there are a total of 4.
Hopefully some manufacturer will someday add a few more 15mm females/ amazons to there line up. Sculpted to a high quality. There is only a small handful of female 15/18mm miniatures avaiable anywhere, most are fairly primatively sculpted, the market could sure use a few more.
Any company who sculpts and sells miniatures willing to give a go at adding a couple 15/18mm females to there line, the market doesn't seem very crowded.