Haven't read the whole thread so this have proberbly been suggested, but, I've always thought that some type of religious crusading crew for the Guild would be cool, preachers and the like (holy handgrenade?).
The cirkus/carnival idea would be cool for either neverborn or outcasts, the indian shaman idea is also cool.
A Jekyll and Hyde theme would also be very awsome.
That's one of the cool things about Malifaux, so many options and ways to go with it.