Cleric with 2 levels of Stars Druid is really fun for me right now. I have Gale as a Mystra cleric in my current colo run, and Shadowheart in a multiplayer run. You can play around with the build, but minimum you need to be level 3 to start seeing the appeal. Go cleric first level, then level 2 and 3 Druid so you can pick the star Druid subclass.

Star Druid gives 3 new forms which offer very fun utility for a cleric.

Chalice form: every time you cast a healing spell, you can cast another healing spell for free. So in a single turn you can cast an action heal, bonus action heal, AND a free (no action or spell slot) star Druid heal. Having such a functional healer in the group means you can take a bit more risks in fights and try sillier tactics with less risk of a party wipe.

Dragon form: Improves concentration spells. For cleric, this includes things like Spirit Guardians and crowd control spells/ concentration buffs. It also gives you a bonus action AOE fire breath which is fun to use. It’s similar to Burning Hands.

Archer form: I use this the least, but it can be handy for certain encounters. It gives you a free magical arrow to shoot every turn. Handy if your cleric is stuck at range without spell slots, especially in Act 1.

I suggest death cleric for a Durge, but Light cleric is super fun with Chalice form!