Agreed on metal covers, and also I didn’t know that Ghost covered Enter Sandman (I’ve kindof lost track of them since loving Meliora and not at all loving Prequelle), but without looking up I can already hear it - that song was practically made for them to cover.
I basically came here to mention the already-mentioned Metallica cover of Turn the Page. I don’t even like Metallica that much but that’s one of the first things I think of for “cover I like better than the original.” Also a perfect example of one of the great things about a metal cover of a non-metal song - you don’t have to decide is one is better than the other, since they’re so damn different.