The list of police procedurals out there can seem endless, but if you're feeling overwhelmed just think of all the police officers who not only have to solve these crimes, but fill out the paperwork as well.
If shows about people speaking to the dead speak to you, then you're on the right list, composed mostly of detectives who have a direct line to the after-life and use it to solve crimes. Miss Cleo was wasting her talent!
Not saying these lighthearted series are formulaic, but you can create your own by pairing an eccentric psychic, novelist, conman, anthropologist, magician, etc. with a grizzled cop, private investigator, FBI agent.
These shows build on elements of Twin Peaks--evil bubbling underneath an apparently wholesome small town, detective work, surrealism, some horror, and undertones of the supernatural--all with a nod to David Lynch's distinctive style.
Lost combined an overarching plot, ensemble cast with dense backstories, a creepy setting, symbolism and mythology, and of course of a steady stream of mysteries that keep you guessing. There may never be another Lost, but shows like The Leftovers, Siberia, and Carnivale may scratch that itch.