I remember an old Dungeon adventure I always liked called "The Wounded Worm". Basically a crippled dragon, having survived a group of adventurers, starts using charms and other subtle tactics to control the lands around him and prevent anyone else from threatening his life.
The adventure is pitched to the PCs as "just go here, finish off the beast, and get the horde", but it quickly gets complicated with all the minions the dragon has. Really, it was less a dragon (it couldn't walk or fly, don't remember if it had breath weapon or not) and more a scaly evil wizard. So it wasn't a typical hunt, but still interesting.
As i said Dungeon has lots of them. This one is from...
Issue #8 Volume II, Number 2 (November/December 1987)
WOUNDED WORM, THE
AD&D adventure, 4-10 characters of levels 4-8
Written by: Thomas M. Kane
Artwork by: Mark Nelson
Coastal/Undersea, temperate
11 pages
Description: Sparock Peninsula is threatened by a maimed red dragon.
There are also
Issue #6 Volume I, Number 6 (July/August 1987)
WHITE DEATH
AD&D adventure, 4-8 characters of levels 4-7
Written by: Randy Maxwell
Artwork by: Jim Holloway
Hills/mountains, arctic to sub-arctic
5 pages
Description: The hunt for a predatory white dragon leads the characters into a deadly trap.
Issue #16 Volume III, Number 4 (March/April 1989)
VESICANT*
AD&D adventure, 4-7 characters of levels 4-6
Written by: Randal S. Doering
Artwork by: Mark Nelson
Coastal city/any wilderness, temperate
22 pages
Description: The pirates of Scrape have a deadly ally -- the dragon Vesicant -- and heroes must find the green wyrm's lair.
Issue #17 Volume III, Number 5 (May/June 1989)
OUT OF THE ASHES*
AD&D adventure, 6-10 characters of levels 8-12
Written by: Grant S. Boucher
Artwork by: Carol Heyer
Mountains/Forest, temperate to sub-arctic
22 pages
Description: The red dragon Flame has returned and found himself a new lair -- a crystal citadel hovering above a sea of burning lava.
The sequel to "Into the Fire" (Issue #1).
Issue #43 Volume VIII, Number 1 (September/October 1993)
INTO THE SILVER REALM*
AD&D FORGOTTEN REALMS adventure, 4-8 characters of levels 8-12
Written by: Steve Kurtz
Artwork by: David O. Miller
Any wilderness, temperate/Astral plane
21 pages
Description: A dragon-slaying mission to Mount Cinderspire embroils the PCs in a githyanki scheme to seize control of the Northlands.
Issue #51 Volume IX, Number 3 (January/February 1995)
JOURNEY TO THE CENTER-OF-THE-WORLD
AD&D SideTrek adventure, 4-6 characters of levels 8-10
Written by: Chris Hind
Mountains, tropical to sub-tropical
2 pages
Description: Heroes hired to explore the crater of a dormant volcano find a cruel, cantankerous white dragon resisting the cold embrace of death.
And for something completely different: rescue the dragon!
Issue #9 Volume II, Number 3 (January/February 1988)
PLIGHT OF CIRRIA, THE*
AD&D adventure, 6-10 characters of levels 8-12
Written by: Grant and David Bouncher
Artwork by: Valerie Valusek
Forest or Jungle/Clouds, tropical to temperate
14 pages
Description: Ezoran the arch-mage has kidnapped a cloud dragon's mate. Heroes are hired to free the dragon from the wizard's cloud fortress.
Issue #62 Volume XI, Number 2 (November/December 1996)
DRAGON'S DELVE*
AD&D adventure, for 4-8 characters of levels 3-6
Written by: Christopher Perkins
Artwork by: rk post
Mountains, arctic to sub-arctic/Subterranean
24 pages
Description: Something has seized control of Thunderdelve. The heroes must rid the fortress of its evil menace to free an enslaved crystal dragon.