Not part of the Mordheim range, these are useful characters to have around to add a little spice to a scenario.
The entire Villagers and Townfolk range are also great for innocent bystanders.
Always handy in a tight spot, assuming that they're on your team!
Johann and Wilhelm are obvious, but many of the other DOW characters have potential, as long they aren't riding a Dragon!
Johann & Wilhelm
The Citizens of the Empire pieces, plus several of the later characters fit right in.
Down in Docks they say the dead walk the streets, or least sail the seas
Zombie Captain of Sartosa
Zombie Pirate of Sartosa
Most of the Warhammer Quest characters are an easy fit in Mordheim
