All the 4th edition Dragons were designed by Trish Morrison, with riders by various other sculptors. Initially they were all metal, but following the release of the plastic Talisman Dragon, the wings from that were used.
4th Edition Dragons
Zombie Dragon
Prince Imrik, Lord of Dragons
Prince Imrik, Lord of Dragons
Talisman Dragon
Rakarth the Beastlord on Black Dragon
Egrimm van Horstmann on Chaos Dragon
Forest Dragon
Orc2: Orc Shaman on War Wyvern
Azhag the Slaughterer