As I am playing in 15mm, it is easy to collect monsters for all the factions in Five Leagues from the Borderlands, but the posts disappear too quickly on the blog, so I am collecting links to them all here for my own reference. The three main hostile factions from the current campaign are represented in this list, as are all the non-faction monsters and three non-campaign factions. You can occasionally encounter non-campaign factions, so I have three factions to be going on with and will add all the others as I get them painted.
The Gnawling Horde (Animal people)
The Ice-heart Court (Fay folk and their allies)
The Oldest Kin (Lizard folk)