My take on Dancer: Melee range healing class that works like a reverse Bard in a lot of ways. Having different debuff dances that apply a negative effect on enemies in range while casting heals. Dancer would be a stronger team healer with heals that rebound off allies.

Another suggestion is Musician or Minstrel. This class would be connected with Bard in some way but represents the Bards that surrender the bow and arrow in exchange for more magical music to support their team. Their weapon is the flute and specialize in channeled team buffs and Heal over Time effects as they play their music. So they can keep up with the healing of other classes, they could have an ability that detonates all allies HoT effects for immediate HP recovery.