Sadly, I don't really know any "good out-the-box" paragon adventures... On the other hand, with some work, many heroic tier adventures can fit the bill very nicely.
Suggestions
The "Giant Series" - I'm not a fan... but it's by Chris, it covers the right levels, and... well those are the basis of this recommendation.
Touch of Madness + Depths of Madness + Brink of Madness -
dramatic changes are required to make this anything other than a prime example of how "not to use 4e". It is grindy as all-get-out. But if you convert good portions of the encounters into a skill challenge, or if you make the whole of the "strongholds" into one or two encounters (instead of 5+), then the story can be pretty cool. For this adventure to work, you really need to set up the story, and have the PCs interact with the NPCs
before all the bad stuff happens.
While these adventures are, IMO, the best examples of the bad presentation and focus of published 4e modules, there's a very cool adventure hidden in there. If you find yourself looking at these, I'd be more than happy to workshop it on the forums!
Remains of the Empire - not only does it give an appropriate reward for paragon tier characters
(flying "dragon" mounts!), it works beautifully when you add-in a relation with
Dythan's Legion.
There's a whole lot that can be built from this adventure (plus, I really like it on it's own!).
I know this is an Heroic tier adventure, but upleveling is so easy...
Lord of the White Field - This is a
great module. Uplevel it to taste, and BAM! An awesome evening (or two) is in the works.
The Dark Heart of Mithrendain - Requires a bit of work, but with 5-6 post-its worth of notes, should work well. If you're looking to bring-in Feywild elements, this one serves a very good "connector".
Winter of the Witch - strong ties with the Nentir Vale built-in, will probably require some fiddling around with replacing some encounters with skill challenges, or combining encounters (as with,
most published 4e modules...), as well as down-leveling. Has a "Paragon" feel in my eyes.
Works awesome with some setup : a lot of place build with relations of the "winter faction", Prince of Frost, the witches in the northen Nentir Vale, the Raven Queen (and thus Orcus). Could make some awesome links with Crown of the Winter King, Mithrendain, Lord of the White Field, and even KotSF... !