27 covers of Black Sabbath (Ozzy Era) songs in alphabetical order. Let me know if there are any other great covers that I missed. 12/23/18 update: adding in a few more additional great cover that I happened upon.
There's this compilation called In These Black Days, released by Hydra Head, it has some interesting stuff, including that cover (it is also included in their s/t album tho), and other interesting stuff like Converge making a cover of Snowblind and Neurosis making one of Children of the Grave.
Thou - Through the Empires of Eternal Void
4 song: Into the Void, Sweet Leaf, Lord of this World, Black Sabbath. listen to it now unless you wanna keep living your life in obliviousness