If we're consistently trying to pull classes in from other games, I'm putting forward the Aion Cleric.
A sword and board healing class, that also has the option of a two handed weapon when some mobs just require dps.

Bring this type of class in here please!
https://board.en.aion.gameforge.com/...s-Information/

People can say if I like this class so much then go and play the game. Well that's precisely my response to those who keep quoting IX, XI, or whatever.