I'm leaving the C26 Fighters until last, as GW only released a hand full in slotta format, before selling all the castings to Foundry...
In terms of the 1985-7 GW and Marauder range of Fighters, Villagers , Traveling Players, Clerics, Wizards, Mercenaries, Militia, Rangers, Paladins, Heroic Fighters, Big Fighters, Battle Lords, Vikings, Barbarians, I have all apart from about 15-20 models.
I am missing the Nuln Spearman, Greely, the Guard Captain and some other rarities, but they have only ever been spotted once, and never seen painted apart from in WD90