Alright, let's get into it. I'm gonna be upfront and say that finding that sweet spot between actual romantic development and solid adventure plotting in the genre is tougher than it should be. A lot of titles just use the adventure as a flimsy backdrop for the scenes, which gets old fast.
One that consistently comes up, and for good reason, is 'Killing Time' by Ashley Avelyn. It's a fantasy western about a bounty hunter and the outlaw she's hired to transport. The journey across the desert is genuinely tense, with external threats that feel real, and the romantic tension builds slowly from mutual distrust to something way more interesting. The scenes feel earned because the characters have a history by that point.
On a different note, 'The Dragon's Bride' by Katee Robert gets recommended a lot for monster romance fans, and while the adventure elements are lighter, the world-building around the political marriage between a human and a dragon king has stakes. It's less about a physical quest and more about navigating court intrigue and an external war, with the relationship being central to solving those problems. The balance works because the romance is the mechanism for the adventure, not separate from it.
I'd also throw in 'Heat' by R. Lee Smith, but with a major caveat. It's a sci-fi survival story first, romance second, and it's brutally dark. The relationship between the human woman and the alien male develops under extreme duress on a hostile planet. It's not a cozy read, but the adventure/survival elements are incredibly strong and directly shape the complex, often unsettling, romantic dynamic. It's a balance, but a heavy one.