The Zombie Horde

The summoner would be in charge of a pack of zombies. There is no central champion, and the death of any one zombie transfers control to another. Each has a fraction of the horde's hit points and attack damage Their main advantage is in presenting numerous targets, and the creepy sensation of no central nervous system. They would be advantageous against high-burst opponents, wasting their damage with overkill. They would be vulnerable to crowd control, as they are a crowd. Abilities could be summoning skeleton warriors and skeleton archers.

Skin variants might be something like Zergling swarms, or Demon hordes, or Ork Hordes.