Total War: Warhammer II is an absolutely massive game featuring dozens of factions to choose from, ranging from Elves and Dwarves to lizardmen, ratmen, several types of undead, and so much more.
Europa Universalis IV is both one of the most frustrating and one of the most rewarding grand strategy games around. Not to mention extremely addictive once you finally manage to wrap your head around it.
Crusader Kings III is essentially a dynasty simulator where your goal is to establish and maintain a powerful bloodline that will last several centuries.