As I write this post, GW is preparing to restart the franchise, with pre-orders coming up in November, including a brand new Skaven team, along with accoutrements:
#13 Goblin Forge
From what I can tell, these two figures are the only BB Ratmen Goblin Forge did. I guess they're humorous, in an old-timey cartoon sort of manner. The second one isn't awful, the pose is actually quite clever, but is that first one meant to be...Elvis? Doing the "Crane Stance"?
#12 Mano Di Porco/Fanath Art
Another Spanish company, Fanath Art had a website (well, blog/store) but abandoned it to exclusively retail through Facebook (and Comixinos, again). And again this is one whose selection is limited to 2 ratmen figures.
#11 RN Estudio/Willy Miniatures
Willy Miniatures, on the other hand, has some generally fantastic sculpts. Their mummy Team in particular is just gorgeous. Unfortunately, they offer but a single Ratman miniature, and while their "Ogre Rat" is quite good, its isolation is the reason it shares the eleventh spot on this list.
#10 Green Dog
#5 Gaspez Arts
#2 Black Scorpion
I really love these guys. And they blend in quite well with Goodwin Skaven.