Zombie Apocalypse:
1) Necromany Wizard (Gale)
2) Spore Druid (Halsin)
3) Oathbreaker Paladin (Dark Urge)
4) Trickery/ War Cleric (Shadowheart)
All of these can cast animate dead, and the zombies can create even more zombies, if they kill enemies. The oathbreaker buffs them and increases their damage output, meaning they kill more enemies more quickly.
In a settlement with a lot of people, the goblin village and later the city, I hope that this could snowball
