From Gigantic Wiki

Gigantic: Rampage Edition categorizes each hero as either a single role or a hybrid of two:

  • Frontline - Sturdy heroes that can initiate a team fight
  • Ranged DPS - Heroes that deal ranged damage
  • Melee DPS - Heroes that deal melee damage, often with a focus on ambushing low-health targets
  • Support - Heroes that heal, focus on buffs/debuffs, and Griselma (she belongs under Ranged DPS)

Note that these heroes do not perform in these roles equally - The Margrave is much more comfortable being the solo Frontline on the team than Lord Knossos.