As I said above, the default starting level for Legacy of White Plume Mountain is 8 or so (it may be 7 or 9; I don't remember exactly).
I love Path of Evil (mainly because I like playing evil), but what's best depends on the eyes of the beholder. The OP mentioned Aielund, which is way more linear and story-focused than POE, not to mention good aligned. S/he may still enjoy it, but PJ's modules are maybe the closest thing I can think of (he has, I think, 6 modules out, and he's still working on some more).
The Maimed God's Saga is another one you can look at. It's standalone, restricted to clerics and not covering a lot of levels, but it's rather epic story-wise.
Another one I had forgotten about: Subtlety of Thay. Two modules (download only the second chapter, as it includes both) and unfortunately unfinished, but still quite long. Levels ~ 4-12.
I guess there may be a few more I could mention, but those are already quite afar from Aielund.
PS: Now I'm gonna have to replay Aielund.