Another one of these ideas, based on a comment I made. You can find the comment here. Diseases - #8 by Anthoirty
Animals have been digging up corpses and eating them. Gossip around town in the direction of raising the dead, giving hope to the people their loved ones can return. The mortician gets ideas, in the direction of making people ideas come true. Hero of the town helps mortician, offering his DNA or Blood to help the cause. After not solving the problem, gossip continues with passion. Mortician adds his idea to the dead, before burying them. After this problem goes on too long, a zombie woke from the dead. Now the problem is, they have dead folks that are hungry, eating other folks still living. Though they regard the hero as their messiah or savior, following his command and leadership. Are the folk happy about this? Will they join the undead?
Now we have means for multiple character classes along the line of a necromancer and a puppeteer. The necromancer was the mortician and the puppeteer the hero who offer his blood. The folk are their subjects or clergy, praying for their dead asking the hero to return them.
Be careful what you wish for!