I've painted some 15mm Irregular Miniatures minis from Peasants (http://www.irregularminiatures.co.uk/15mmRanges/15mmPeasants.htm) and American Indians (http://www.irregularminiatures.co.uk/15mmRanges/15mmamerind.htm) ranges.
From left to right John Langstaff, PI35 Cowboy or Settler on foot, Pastor Humphries. Really good figures. Knowing that Irregulars have several variants for their figures, I am going to order more variants of these.
And here is a photo of rebased gorillas from 15mm.co.uk