Sure, in certain fanfictions Bella ends up with Jacob. Sometimes, the fanfic writers rewrite the whole Twilight plot, making Jacob a more appealing character for Bella from the start. They might have Bella and Jacob meet under different circumstances that lead to a stronger bond between them right away. It could be something like Jacob saving Bella in a different way that makes her see him in a new light, and as the story progresses, their relationship blossoms into a romantic one.
Geralt ends up with Yennefer. Their relationship is complex and filled with passion. They have a deep connection that has been through many trials and tribulations throughout the story. They care for each other deeply despite their differences and the various challenges they face in the world of the Witcher. It's a relationship that is central to much of the story's emotional depth.