What are the longest running shipping beefs in book fandom history? And other romantic spats on who should’ve ended up with who ?

Famously Jo and Laurie shippers hounded
Louisa May Alcott over how the pairing was handled . Any other such examples from history? Any in antiquity?

Thoughts on the given example.
I find it fascinating how that specific fandom discourse could be so enduring. Even today it's still a bit of a retrospective debate . No matter how many profess to being absolutely ok with it's conclusion.