[JansjoFromIkea]

An even closer one would be the Leftovers seeing as it shares a few key crew members (well, Theroux and the lead writer worked on the Leftovers, at least).

The Leftovers was basically Lost done right, very very clear from the onset that it's about people's reactions to the craziness than the underlying reasons for it. Maniac feels like it has some unnecessary stuff tacked on, the premise has a Charlie Kaufman copycat element to it all that feels like a necessary gimmick as opposed to something which naturally fits into the world.