In my childhood world, the lego guys where the dozers (the builders from Fraggle Rock), and were inevitably enslaved by the Evil Naked Barbies, and then promptly rescued by the My Little Ponies, who exiled the Barbies to the Land of the Potted Plant. Occasionally, the MLPs would have to treat with the lego horses, who, of course, ruled over the lego people with an iron fist. Hoof. Whatever.

...eventually, the evil master mind and ruler of the world was a kitten from a dollhouse set, who is, no joke, smaller than half of my pinkie nail. I still have her, and she resides in a golden scarab box. She is perhaps the proper size of kitten for a lego person.