Update: I was listening to Sleep Token wrong.

Having now listened more intently (particularly to their "Take Me Back To Eden" release, on loop for the past day or so), I recognize that they don't fit in any neat genre box. Their influences are all over the place, and they weave together a rich tapesty of styles. I'm here for it, and I'm so glad that I gave their stuff a more focused listen. I really was missing out!

(Thanks @rych for the guidance and nudge!)