Possibilities could include Goblin Doomdiver, Snotlings, or Skaven Slaves. The Doomdiver is probably dead the moment he hits the ground, however since only 1 goblin can fire per catapult at a time some won't get to fire themselves until the very end of the battle or if there is a surplus some might not get fired at all. Snotlings and skaven slaves are basically just used as cannon fodder on the front line. Snotlings are unbreakable so no chance of running away, meanwhile the slave might be able to run away but he would only live for a few more hours since the warlords would catch and kill him after the battle. Either way chance of survival is very minimal.
Any other ideas?