You're probably aware of this one, but the Coil album Timemachines is a great drone record. That latest Urthona CD/DL over on bandcamp is pretty good too.... https://urthona.bandcamp.com/album/the-other-without
Copeys Odin can do the trick, if your in the right headspace. Sure there are many more I Could recommend, but don't have access to my record collection right now.