Castlevania, despite some of the creators being creeps, has a good one with Sypha and Belmont. It's established off-screen and you simply see them interact as a couple that works closely together.

You don't see the courtship at all and there's little eroticism. I don't know if lacking that excludes it from being considered romantic.

But I like the relationship where they clearly care about each other and I'm certain the romance would be believable if they showed it in-scene. It is odd however how Belmont has a foul mouth but won't say something explicit to Sypha when they're alone.

The other romantic relationships in the series are also established off-screen for the most part. You see couples talking to each other in bed and stuff, but there aren't too many declarations of love or discussion on their relationship, but I think the lack of dialogue around that could be excused by it being 1474.