For this regiment, I had no precise idea in mind for the color scheme: I guess the first painted guy defined the palette for the following ones: black, red and white. So, let's start with the scout of the Citadel Talisman range:
The second painted model is the Tilean Crossbowman from the Citadel F2 Fighter range.
The third one is the Mercenary Crossbowman (same range):
And that's it for the moment!