Fire Emblem Three Houses - Nintendo Switch GOTY Contender?

Probably? To be fair to Fire Emblem, most tactical games with permadeath for party members use generic disposable characters rather than ones ostensibly fleshed out in cut scenes and by party banter. I can’t really think of any off the top of my head that attempt this aside from the ones mentioned. Maybe one of the Tactics Ogre games, but even then, I’m pretty sure that once a character is in your party they no longer factor into the plot or have further character development. I remember it being hard to get one of your characters killed in those, so probably not.