I'm looking for recommendations for ideally 3, max 4, hour one-shot adventures that I can play with a variety of different groups, generally separate from a campaign (so they don't have to be generic enough to drop into any campaign).

The goal is to introduce some new players to D&D through a single session, but I'll also have some pretty seasoned players in the group as well, so ideally they wouldn't be boring.

The time limit is pretty hard here. By "one-shot" I don't mean a standalone short adventure, I mean an adventure that can be played in a single, max 4 hours session (excluding character creation).

I'm already familiar with and have run The Wild Sheep Chase (Winghorn Press), The Secrets of Skyhorn Lighthouse (Arcane Library) and The Workshop Watches (MCDM) for the returning players, but things along those lines are good.

Thanks!