Active or passive healer? Active maybe Kind Wayfarer (KW) or Elcga /Eothos Priest? Thats what I actually use. I have adequate healing spells with priests and the Flames of Devotion (FoD) from KW provides dps and heals whereas Elcga provides death immunity for a few seconds (good with high int). Will be tanky enough if you want. Or if you dual-wield as a KW and use FoD, you heal twice as its considered a full attack and thus you cast twice (and heal twice) if you dual wield.
Otherwise for passive, theres a tanky heals with Elcga/Troubadour that pulses heals build in the build list.
I personally use KW/Eothos as my main for both RP and burn dps and heals. At lower levels I used Xoti as a pure buffer but at higher levels she was just dps.