N2 - The Forest Oracle ought to be a hoot
B4 - The Lost City
L1 - Secret of Bone Hill
U1 - Sinister Secret of Saltmarsh
Unless you really want to rely on common sense
But I don't think that I want to use old-school dungeons, since they usually have the same "problem" as Caves of Chaos .. that combat is usually to straight forward (no interesting terrain, included traps, etc.).