So building off of my "Half-Baked Adventure" and my sorta-update here is a plan.
Here is what I have at the moment.
Basic: B1 In Search of the Unknown
AD&D 1st Ed: C2 Ghost Tower of Inverness
AD&D 2nd Ed: RM4 House of Strahd. Total cheat I know, but I'd run it as if it were in Ravenloft.
D&D 3rd Ed: Expedition to the Ruins of Greyhawk
D&D 4th Ed: The updated Tomb of Horrors
So some remakes and updates. But all with classic roots.
Now to buy a copy of Expedition to the Ruins of Greyhawk.