I heart Grant because he is both lovely and also great at designing play experiences (see Goblin Quest, Spire RPG, and Skyfarer). The core team is nicely diverse too.
Their latest, HEART is a standalone system aligned with Spire both mechanically and narratively where you explore a shifting mythic underworld that’s actively trying to kill you and keep you.
If you want to read more and see some pretty art and maybe sign up for their playtest pack, go here — https://rowanrookanddecard.com/sign-up-for-the-heart-rpg-playtest-now/
I hear they’ll also be at GenCon if you want to play with Grant himself leading (he’s tall and charming soo)