D&D One Shot

The PCs are scarred sages who must run a tavern for one night as a favour for the owner. It is frequented by labourers. A characters is under a geas. It might involve fey.
There is an intimidating thief who works against them.
The characters start with an attempted theft. Early on they encounter an annoying trap. If things get stuck a door opens.
It finishes with a reward of a more dangerous quest with a great reward.

The characters are shapechanging pirates who must protect a dwarven cathedral. One or more characters is currently is carrying a disease.
It is at an exposed shipwreck which is protected by a poltergeist.
There are a few mismatched soldiers being noisy. And an unicorn seeks to complete a ritual in a warded city rooftops.
At some point they discover a secret door.
As the adventure progresses there are hints leading to a great betrayal

The characters are all part of the same crew of a ship who must make a trade with a mutant demigod.
It is at a cursed high temple which was the site of several murders.
There are a group of mercenaries wedding. And a yuan-ti seeks to destroy a runic ring.
At some point something goes missing.
As the adventure progresses there is a series of murders

The PCs are rebel wizards who must steal something from a celestial unicorn. A character is being hunted by a sahuagin priestess. It might involve fiends.
There is a wise politician who betrays them partway through.
The characters start in a dream sequence. At some point they encounter a tornado. If things slow down an animal messenger arrives.
It finishes with a reward of a dragon's hoard.

The PCs are fun-loving entertainers who must solve mystery of a missing god. Two of the characters are former friends. It might involve a cult.
There is a feared noble who works against them. they are the parent of a character.
The characters start at the scene of a murder. At some point they meet an intelligent beast. If things slow down a door opens.
It finishes with a reward of the thanks of the people. Possible sequel... the adventure becomes the first of a multi-part quest around the same theme