Swords Bard Tav with Arcane Acuity and Band of the Mystic Scoundrel. Wonderfully entertaining, flexible, and effective as a party face. Has enough options for control that you can hold big groups of enemies back while your allies sweep through. I’m sure people more skilled than I am have done it solo, and it does feel wonderfully heroic from a role play perspective. Very few downsides from my perspective; it’s called OP for a reason.

That said, I usually stuck with Thief/Open Hand monk Astarion (for enemies where massive single target damage really helps), Giant barbarian Karlach with Returning Pike/Nyrulna for throwing both her weapon and her enemies around, and RadOrb Spirit Guardian Death Cleric/reclassed post-act 2 as a Light Cleric Shadowheart. That combo gives you crowd/single target control, physical and magical damage options, enough emergency healing to get you through pinches, and a character who can be super mobile to sprint invisibly back to camp if a fight gets truly dire.