D&D One Shot

The PCs are secretive ogres who must steal a possessed wolf. One or more characters is currently cursed. It might involve elemental earth.
There is an infamous assassin who hates one of the characters. they are the lover of a character.
The characters start at the scene of a murder. At some point they encounter a new potential ally. If things are going nowhere there is a murder.
At the end there is a reward of an expensive meal.

The PCs are religious lizardfolk who must investigate the history of an intelligent helmet. It might involve orcs.
There is an old monk who betrays them partway through.
The characters start with an escaped beast. Early on they encounter a thieving NPC. If things slow down a new adventurer turns up.
Afterwards there is a procession.

The PCs are fugitive half-orcs who must steal a magnificent axe. The mood might be... whimsical
There is a loyal wizard who tries to help them. they share a hobby with a character.
The characters start in a fight. At some point they encounter a trapped chest. If things slow down they spot a lone enemy scout.
It finishes with a reward of a favorable marriage. Possible sequel... a clue from a reward or treasure points to an infamous dungeon...

The PCs are feared paladins who must investigate the curse of a crystal tailsman. The mood might be... action
There is a feared wizard who works against them.
The characters start waking at a shipwreck. Partway through there is a funeral. If things slow down a deity sends a sign.
It finishes with a reward of a more dangerous quest with a great reward.

The PCs are novice pirates who must recover a beautiful staff. A character is being hunted by a faction. It might involve elemental earth.
There is an aggressive ruler who betrays them partway through.
The characters start in a tense stand-off. Early on they encounter a new potential ally. If things get stuck a planar portal opens.
Afterwards there is a reward of an artifact.