In terms of romance, Panoramia is probably still my favorite, but the options aren't great.
Pan is good because they have a cute senpai dynamic, and while Pan started by fangirling over us, she has gradually gotten Used To Mathilde's Shit. I give her a lot of points for that. Much more grounded now, literally getting her hands dirty in establishing the farmland. Buuuut her lack of narrative relevance for a while hurts her, she could feel a lot more viable of the two had interacted outside of the Duckling club. Lots of people will criticise the clear power differential, Mathilde acted as mentor for a while and scolded her about being a dumbass. That's fair, though Pan's own growth has mitigated this a little bit and put us on a slightly more equal footing, which could be made more clear by social interaction.
Johann I'm not overly fond of. I didn't really like him for his caginess during the Expedition, he just had a bit of an adversarial relationship with Mathilde for a while because of his deceptions. We've had great fun on our raids together, but while I hypothetically like seeing Opposites Attract, they just don't seem to fit together.
Belegar is a king that needs Dwarven Heirs from a royal wife. He's fucking awesome and a great character, but idk if I love the idea of putting romance in the picture.
Gunnars is kinda the only Dwarf I theoretically could see, if we find out his whole deal. His bit on the relationship screen about his view of us intrigues me. Some potential there, even if I find it odd to imagine romancing a Dwarf.
Kragg nooooooooo. He's our cranky grandpa, and nothing else.
Boy, we have no candidates that are as good as Abelheim was for me. Mathilde is in too strong and independent of a social position right now, the people above her are inaccessible for other reasons, and the people that aren't too far below her don't get much screentime or are just not super interesting to me.