Some of the ZEITGEIST Adventure Path for 5E is free on the EN5ider Patreon (and any patrons have access to the catalog of 300+ articles, which at this point includes ZG #1-#9).If you have any questions about ZEITGEIST, just ask. I was the director of the AP.
The basic conceit is a fantasy setting where one nation kicked off an industrial revolution, which is shifting the balance of power. The PCs are special agents of their home country, tasked with solving crimes with international stakes. Think a mix of Sherlock Holmes and The X-Files.
Let me elaborate. I dropped RA into Greyhawk where the Dreadwood meets the coast of the Azure Sea and mashed it up with Ghosts of Saltmarsh for the starting location. RA 5e has sahaugin, sea caves, a forest full of bandits, even pirates - all of which overlap with the Saltmarsh setting. Aside from the main Dungeon of Graves, RA 5e has three other major dungeons and a dozen smaller location encounters. The two books together cover about a dozen Greyhawk hexes - it's a big sandbox for my players to explore.Heh, I worked on that book. Its super deadly, but I wouldn't call it an adventure path, as you basically stay in the same dungeon the whole time.
EnPublishing's Zeitgeist is worth a look. Massive in size and scope, but flavorful as all get out.
We're working through Red Hand of Doom from 3rd edition, but have adapted it to 5e. The players seem to be really loving it, and so far its been an easy conversion. It's for levels 5-11.
If you don't mind converting, Paizo has quite a lot of APs, most of which are pretty good. I'm converting Rise of the Runelords to run it in 5e now for a new group.