Oracle Moon is really impressive; kind of got overlooked at the time but the consensus seems to have righted itself.
2000 was an utterly ridiculous year. Not only was the music brilliant, but on a personal level I was two or three years into getting myself reacquainted with metal after having abandoned it for most of the 90s. Right as I was figuring out which bands were my favorites, those bands were putting out some of the most powerful and interesting music not just of their careers but of metal historically. I even love all the whacked out studio production that was happening as artists were sort of flailing around in search of new directions and sounds. I can understand why so many longtime metalheads were sort of horrified or at least disappointed by the way things were shaping up, though.
Still fiddling with my ballot. Christ I was up to forty or so before I got to the questionable stuff. Insane.
Mardraum is firmly at #1 however. One of the most massive works of all time.