I'm going to name the ones that I remember:
Dragon, Merryll, Kusinov, Gisele, Nalla, Obrak, Gabriel, Hitomi, Borom, May, Jack...
All the made an ''apparition'' in Millennium 4, so what do you think of them?
By the way, if you're reading this Indy, their artworks are different (the lords that appeared in MM4)... there was a new artist? Who was it?