Buddhism comes closest to my moral beliefs, even if metaphysically it can be a bit... out there. I also have a bit of a fascination with Ibadi and Shi'a Islam - the former for its views of predestination and how to interpret religious law and the latter for it's unique views on trans rights (at least in Iran). It would have to be a pretty darn liberal interpretation of any form of Islam for me to even consider joining, though.
EDIT: And also for the record, I'm currently a de jure Lutheran but de facto irreligious.
Within Buddhism, Zen can be metaphysically totally materialist. Although I guess still weird or at least disorienting.