TwoFaceGames have an established knack for coming up with innovative ways to use the RPG Maker system.  Port Traventor's their biggest game yet, and it's a unique hybrid concept that's first and foremost an idling kingdom manager that also incorporates JRPG-style quests and combat.  It can get a little grindy but in a way that will seem normal to most JRPG fans.  There's no downtime - always something to do and some new upgrade to strive for.  Creative. 

Castle Warfare's an interesting concept, sort of a turn-based version of something like Warcraft. The gameplay is fundamentally kingdom/resource management through a JRPG-style interface and the combat's scenario-based. Features both offensive and defensive levels.  There's 2-3 hours worth of game here; it's fun for what it is although it could benefit from some QoL upgrades and I'd love to see the dev take the concept further.