My favourite is and always will be bard. I did finish my HM run with a sword bard 10 /fighter 2 combo and it was pretty powerful and fun.
Lorebard is great too. If you want to be a skill monkey, put in two levels of knowledge cleric and take spells like sanctuary, Bless etc.
Warlock and sorcerer are fun too Warlock is often teamed up with another charisma based class for me - I like making Wyll a lockadin.
I also started to like assassin/gloomstalker and pure tempest cleric. Those are the goto classes for my Astarion and Shadowheart, if I don't play that myself.
I also like a bit more absurd stuff like lore bard/divination wizard to really drive home the 'No, you won't do that' with Cutting Words, divinations dice changes and Counterspell.
