The soundtrack to any and all Guilty Gear games. Heavy metal, but with a Japanese singer that speaks very poor English. Also the lyrics are genuinely wholesome, so you get a blend of metal, feel-good, and comedy, all part of a balanced breakfast.
I had a church small group leader (way back in the day) who was super into Japanese heavy metal. He also drove a souped up Mazda with a rotary engine, so I guess you could say he was very cool.
Looks like the Korean artist Mid-Air Thief did an international release of their 2018 album Crumbling a few months ago, which is a good excuse for me to listen to it all again. Here's one of the best tracks.