All of them, in that they all have potentially a pretty good elevator pitch and adventure modules and paths are a pantry of ingredients to make a story not really a premade story. You still have to insert characters, and convert it into 30 or 40 episodic stories that have a connecting arc.Just for fun:
You are put in charge of adapting an existing campaign length adventure to prestige television for WotC. It can be any campaign from any edition, but it HAS to be a campaign not just a single adventure (so no Keep on the Borderlands or the orginal Ravenloft. Note that the "short" campaigns and anthologies are okay too. Assume you have a very good TV budget, but not infinite resources, and the requirement is that it is live action. Additonal Difficulty: it cannot be a campaign that also has a novel series, so no Dragonlance or Time of Troubles.
Which campaign do you choose to adapt to prestige television? If you care to do some fan casting, go ahead.
For my part, I would vote Avernus except it would require way too high a budget to do it justice. So instead I would probably go with Dragonheist: it has a cool theme, lots of potential for thrills, but is not so expansive as to blow the budget. I would cast Walter Goggins as the lead, in the form of a down on his luck rogue who owes money to Xanathar.
No one reads the OP...Dragonlance seems like the most obvious choice.
I considered this, too, but thought it might be too expensive. RHoD is a great module I keep meaning to convert.Red Hand of Doom from 3rd Edition has potential to be good.
That's not an adaptation of a module though, is it?Despite the clause in the first post, the only one I'd be interested in IS a Dragonlance series that covers the War of the Lance.
Yes, DL1-14.That's not an adaptation of a module though, is it?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.