Not sure if this series is considered obscure, but have you watched Platinum End? It's created by the same author/illustrator who made Death Note, but I don't really see it being discussed much. In short, it's a story about God trying to name his next successor among 12 (or so) candidates.
Also for manga, I would recommend checking out 20th Century Boys by Naoki Urasawa! It's pretty much a classic manga series that serialized in the 90s - 00s but I always recommend it before anything else first because I rarely hear anyone talking about it these days + I love it so much