Dickens is criticized sometimes for his female characters, but he was a developing artist till almost the end. The love of Pip for Estella in
Great Expectations and the "relationships" between Lizzie, Bradley Headstone, and Eugene Wrayburn in
Our Mutual Friend are intriguing.
One could mention Dorothea's story in Eliot's
Middlemarch (and the young doctor's life with Rosamund in the same book), but I admit it's 40 years since I read this novel and I'm not sure I will read it again.
I agree with the original poster about
Anna Karenina. The famous affair of Anna and Vronsky is a very great presentation of eros as destructive god, but it is balanced by the too often neglected or forgotten love of Levin and Kitty. By the way, it's my view that the great artists can take risks that would not end well in lesser hands. One example is the climax of Kurosawa's film
Throne of Blood. Audiences would have laughed had this been done by a lesser artist. (I don't want to be more specific, for the sake of people who might not have seen the film.) But in
Anna Karenina Tolstoy took a risk with the scene in which Levin and Kitty are writing strings of letters, the first letters of certain messages, and the other person does get what is meant. This might seem corny, contrived, in lesser hands. And, yes, the seen with Levin's brother and Varenka, on the mushroom hunt, is poignant and convincing.
The study of jealousy in Trollope's
He Knew He Was Right is tangential to this thread but I'llmention it anyway. How about the Lily Dale - Johnny Eames matter in the Barsetshire sequence? I salute Trollope for daring to "fail" his readers' wishes. As Harry Nilsson spoke it:
Now, if you haven't got an answer, you'd never have a question
And if you never had a question, then you'd never have a problem
But if you never had a problem, well everyone would be happy
But if everyone was happy, there'd never be a love song