It's funny that you word it like that. "Something that's more VN than RPG, but more RPG than VN" is exactly the game I'm making (it's called Firmament). I didn't find anything that was exactly what I wanted when building the game (there are Unity plugins for the dialogue system, but usually with tradeoffs that favored features I didn't want in the first place).

I ended up writing an engine to do this concurrently with the game itself. Here's a picture of a scene opened in the engine: https://i.imgur.com/jEhw1QR.png

Here's a link to the Discord server where my friends and I who make games hang out. If you're interested in these kind of half-VN hybrids, then you should come say hi: https://discord.gg/pbX9tVuW