Still here is a build for now for a fighter swashbuckler.
Fighter
Champion
Wild Elf or Lightfoot Halfling
Pick twf or dualist as you fighting style and then the other later.
High dex and either leather armour or if you prefer the puffy white shirt get a wizard to cast mage armour on you.
Rapier if dualist, or a scimatar or short sword in one hand and a dagger in the other if twf.
High Dex, High Charisma Criminal/spy background.
You'll be brutally deadly with your sword/swords, picture a rapier with +2 damage, two attacks per action which can be against different foes or the same one, with a 18-20 crit range and you can even do the princess bride manvuer.
PS the Princess Bride manvuer in this case is getting back to ones feet after a savage wound and saying I am blank, you killed my father, prepare to die!
Which champion can do first with his second wind and later his regeneration ability.