Still during the 90's and early 2000's some bands started to do all kind of crazy mixes involving Doom Metal:
I remember how confused yet amazed I felt when I listened to this vinyl in 1993.
Confessor takes Doom and throws it in a complex time signature labyrinth with guitar riffs not too far from what slow Pantera or Meshuggah would do. On top of it all there's a Power Metal like falsetto vocal delivery. Their debut may not be the easiest listening thing out there, but after a handful of spins it may turn you into a fan like it did to me.
Another weird as hell Doom band is
Harvey Milk. With lashes of Noise Rock and experimentalism, these dudes even incorporated a sledge hammer during their early releases that the vocalist used to wield in Intervals with his guitar playing. To me it somewhat sounds like if Henry Rollins wanted to make a funeral doom band with southern influences, while adding tons of noise to the mix. I picked this track from their fifth album since a) IMO it's pretty cool and b) something tells me the record's cover may be somewhat familiar to most members on this forum.
I must admit Drone is a subgenre in Doom Metal I don't have patience for. Even so, there are some compositions by
Boris that I find truly immersive and well thought, going way beyond the somewhat boring experience I go through when listening to Drone bands. This song in particular is really beautiful and powerful.
Messa is pretty much the Doom Metal equivalent to what Zeal & Ardor was to Black Metal. The Gospel and Spiritual Chants influences gives these guys a pretty much unique vibe within the genre.