I don't want to make it seem like I absolutely abhorred my time with Graveyard Keeper. However, I feel I only didn't absolutely hate it because I'm already a massive fan of the genre. I can't in good conscience recommend it to you if you're only looking for a new game.
All in all, though, The Sims 4: Seasons is worthy of your time and attention if you already have the base game. The expansion packs (with the exception of Get Together, really), all bring something new to the table that adds more life to the game.
In any case, I don't know why exactly Quantic Dream finally made a game I loved (as in, why it took them so long), but as a fan of Until Dawn and The Walking Dead, I'm glad I can actually add a third game to my favorites for this genre. Maybe it's because all of the characters are supposed to be robots so you're force-fed story and juxtaposition through analysis, making it easy from a writing perspective.
More options means more gameplay possibilities for simmers, and we all know how much we love making up stories. With The Sims 4: Cats & Dogs, the missing piece to any household that needed a pet is finally filled. And even if you don't care about that, there's enough in The Sims 4: Cats & Dogs to make this one of the best expansion packs you can get to date.
XCOM 2: War of the Chosen is definitely not for newcomers to the series. I highly advise you to start with just the base game if you're intrigued at all by XCOM or the strategy genre because this adds so much more on top of the already difficult game that it might turn you off completely.
All in all, if you’re a big fan of Cities: Skylines, this expansion is one you should at least have on your radar. It increases the difficulty, introduces some pretty long, unique scenarios, and lets you feel like a malevolent god with the ability to just drop a meteor right on the city center, if you wanted to.