Unhinged literary love story

Hello, I’m looking for well-written books with love story/romance elements where the characters are a tad unconventional and a little insane. I tend to prefer classics and literary fiction, but I’m open to a variety of genres, such as fantasy and science fiction. I loved Wuthering Heights and I’m not looking for the same type of story specifically, but you get the idea. I tried reading some literary fiction with romance elements like Thirst for Salt by Madelaine Lucas, but it couldn’t get my attention because the characters just felt so normal. I love ones that make you want to pick their brains apart. Ty for any recs!