Ha! I was in the middle of adding a WHOLE bunch of examples to my previous post, which included Ricardo Queso. But since it got new-paged, I'll re-paste it here.
They're still going, put out a few more albums since then, but mostly do original songs now. They did tour the anniversary of the Metallica covers album in 2019 (I went to see them at the Sydney Opera House). They just released a new album as Covid wiped out the music industry, so they'll probably start touring on that, which was a bunch of instrumentals. They still do the occasional collab with other artists.Apocalyptica was a cello quartet put out an album of Metallica covers. They put out a 2nd album with Much better production that was some metallic covers, but also Faith No More and Sepultura, and added drums and some vocals (including Corey Taylor from Slipknot). 3rd album had more originals, and more vocals. I'm not sure what they've done after their 3rd album, though.