Fantasy Zombies - Dwarves, Elves, Halflings and Gnomes but also Hobgoblins, Dragonborn, Birdpeople, Goliaths/Half-ogres and Catpeople. Also a Turtleperson with a cracked and fragmented shell would be awesome. Also zombie Ogres (at least two, one male, one female).
All the rest of my suggestions are for huge sized miniatures (3 inch base or bigger)
Demonlords - Orcus and Demogorgon look-alikes
Could a huge Juiblex / Demon Ooze be done in Translucent Bones? Is it possible?
but also a Huge, 4-armed Shark-headed demonlord wielding a variety of weapons
Celestials - but not traditional angels (aside from the female Solar to go with the male one).
Consider an Ophanium (burning wheel) Angel
A huge Simhamnkha
A huge Winged Bull (Bull of Heaven / Gugalanna)
and a Gargantuan Simurgh / Simoorg / Simourv (lots of different spellings, apparently)
Cloud and Storm Giants
A Huge Manticore King
A Dire Troll
Fantasy Ships, Buildings, Fortifications and Siege engines would be amazing, if they're possible.