Graveborns lack a good support character

I've been using the combination of Atandra, Smoky, Koko, Rowan and Cecia quite often. Sometimes I switch Rowan with Odie but I'm starting to feel that Thorn is a better balanced Tank and attacker than Atandra but if I switch Atandra with Thoran, I won't have the 3 of the same group hero advantage.

Koko and Smokey are an absolute must on my team. If there was a good healer graveborn I could replace smokey so I could have 3 affective graveborns on my team because Having Thoran and Mr Caryle attacking in the front is a really good attack combo. Just not enough support. Mallers have good supporters But it would be such a game changer to have a new Graveborn character who can heal and give buffs like how Smokey does. The same grave born character can be given characteristics of Koko and you can introduce another new grave born as a substitute for Koko.

I really like the Graveborn characters and would prefer to have more on my team but it isn't possible when there isn't a good suppport from their group to replace smokey.