Worthy of note, but not my favorite.
--Dio N'arap - Sopor Aeternus and The Ensemble of Shadows
Not so much of a cover but an adaptation based on Black Sabbath's Paranoid, changed lyrics and added atmospheric vocals. I would listen to Sopor Aeternus more but I am freaked out by that Anna-Varney person.
--Symptom of the Universe - Metallica
You should always praise someone who happens to interpret his favorite song. It's Metallica (you may have your opinion of them, I don't even listen to them anymore) paying tribute to the Masters of the genre.
13 Sabbath Jam - Eyehategod
Finally, someone understands that Cornucopia has a killer intro, but is a lackluster song. So they take the intro off it in order to introduce Hand of Doom and end with Behind the Wall of Sleep. A great amalgamation of three great songs.
12 Black Sabbath Medley - Candlemass