The first ghoul figure I ever owned came in the old Grenadier dungeon monster set. (All images embiggenable by clicking)
The eyebrows are a little over the top, but old Grenadier like this always reminds of the Trampier and Sutherland illustrations in the Monster Manual. Here he is again with a later Grenadier ghoul (Dragon Lords monsters of folklore set) and the Metal Magic ghoul recast by Megaminis:
The bestial ghoul on the left and the bone-wielding ghoul seem like ancestors of the later Reaper figures. Here is a set of ghouls generously donated to the Galloway Memorial Home for Convalescent and Wayward Minis. They were made by Reaper:
Reaper made a second set (different sculptor, probably) that is more bestial and naked, again armed with bones:
Ghouls are great monsters because in D&D they really are very scary for lower level characters, since they make three attacks and their touch paralyzes. A large number of ghouls poses a threat even to mid and high level characters, especially if they are fortified with ghasts or thouls.
Lastly, an undead troll which I think was made was Rafm?
The bone paw on the ground there is an actual rodent skeleton part from an owl pellet I found in my parent’s back yard a long time ago. I’m thinking it was a mole’s, based on the claws. If you don’t have any owls puking up bones and fur in your area, you can always go mail order for those authentic parts.