Not really Hannibal-related, but do you know any other good series to watch that are somewhat intriguing as Hannibal Lecter? I'm having some troubles finding ones that can pick my interest

Nothing will peak your interest in the same way as Hannibal does because it is very specific. Specially if it had your interest in the relationship dynamic between two male characters. That’s even rarer. Some people like Killing Eve, and also Interview With a Vampire. I think those are the closest you’ll get to something Hannibal.