D&D One Shot

The PCs are emotionally-scarred landowners who must foil the plans of an inquisitive gnoll fang of Yeenoghu. A character is being hunted by a a xenophobic witch. It might involve spiders.
There is an old priest who comes with them.
The characters start with an attempted theft. Early on there is a big fight scene. If things slow down a magic item develops new powers.
At the end there is feasting in an inn. Possible sequel... an evil organisation's plans were ruined and try to take revenge on the characters

The PCs are imprisoned bards who must destroy an enchanted tree village. The mood might be... action
There is a loyal fighter who turns out to be the villain. they are the travel companion of a character.
The characters start at a disrupted funeral. Early on they encounter a riddle. If things get stuck a mount escapes.
At the end there is someone imprisoned.

The characters are heroic cabal of arcane spellcasters who must run a tavern for one night as a favour for the owner. It is frequented by dockworkers. One or more characters have cursed magic items.
It is at a warded bridge which is protected by a swarm.
There are a group of elves performing a rite. And the ruby high priest wants to create a dwarven chest.
At some point they find a written note.
As the adventure progresses a series of screams signal the arrival of a sadistic champion

The PCs are hungry barbarians who must capture a crazed lizardfolk shaman. It might involve fungi.
There is a ruthless noble who works against them.
The characters start camped and about to be attacked. Early on they encounter an elemental. If things slow down a character has to make a roll to notice something.
It finishes with a wedding.

The PCs are dramatic spellcasters who must survive a night in an overgrown tree village. A character is accompanied by an annoying friend. It might involve gnolls.
There is a heartbroken servant who betrays them partway through. they worked together with a character.
The characters start with an escaped monster. Partway through there is a feast. If things are going nowhere a character has to make a saving throw.
It finishes with a reward of lots of platinum.