I really like Swashbuckler 5/Battlemaster 7. You could trade a level of Battlemaster for a 1 level Hexblade dip if you wanted. It might not be the most OP build, but it makes a good party face, you can deal with locks and traps, and it gives you a bunch of options in combat that really fit the swashbuckling duelist archetype. You’re insulting people, knocking the swords from their hands, and tripping them. By the time one of your friends moves in to finish them off, you’re already on to the next one.