As an alternative to the Gygaxian classics, you might also want to try a run of other popular 1e adventures. This sequence is basically a series of three mini-series. There is no immediate link between each series, but each is a strong storyline in its own right.
U1 - Sinister Secret of Saltmarsh
U2 - Danger at Dunwater
U3 - The Final Enemy
I3 - Pharaoh
I4 - Oasis of the White Palm
I5 - Lost Tomb of Martek
I12 - Egg of the Phoenix
You can intersperse this sequence with I6 Ravenloft, I10 House on Gryphon Hill and any of the S series, as needed. All combined. these will take characters from 1st to 12th level or thereabouts. I've used these adventures a few times - they are strong in plot and action with plenty of memorable elements. If you build an elemental connection as they progress, they culminate quite well with I12.