These are the Dragons (and Wyverns) from the early years of Citadel Miniatures.
FF61-1 Giant Wyvern, DRG1/C11-1b Red Dragon, C11-1a Fire Dragon, FF54 Wyvern,
DRG3/C11-2b Ice Dragon, FF61-2/C11-1c Black Dragon, FF33-1 Emperor Dragon,
DRG2/C11-2a Green Dragon, DRG4/C11-2c Golden Dragon, FF55 Young Dragon,
FTO13-2 Orc riding Giant Wyvern, FF33-2 Great Fire Dragon, FTO13-1 Orc riding Giant Wyvern.
Early Citadel Dragons
Fiend Factory Dragons
Fantasy Tribe FTO13 Orc Wyverns
Fantasy Tribe Dragons
C11 Dragons
Fire Dragons Compared