The River Queen
Basically she's a dedicated.. smuggling/ blockade running ship. 2 decks, 5 rows of oars, full crew of only ~23 people, and most of them are only there to work the oars, because these are the big bastards that you need 2 people to row. Her main mast actually folds down so she's harder to see if needed. I'm not sure if she'd have 1 or 2 masts, probably just one, but maybe there's a way to work 2 in there.
If you've got the wind, she can be crewed by as few as 2 people. Without the wind, 5 would probably do the job. No weapons at all, though she has a slot/turret to mount a single ballista near the prow if need be. That spot could also be replaced by a crane to lift heavy things on to the ship.
Also, due to being a 'stealth' ship, she looks, at least from a distance, like a fishing boat basically.