I recognize a few of them…Bastille had that one hit about Pompeii and then mostly disappeared. Diplo and Die Antwoord I’ve heard of. Pretty sure Joe Jonas is a Jonas Bro. Ellie Goulding had several huuuge pop hits. Everyone’s heard of Mumford and Sons. Biffy Clyro is a terrible Scottish rawk band. Steve Aoki is a huge trance (hack, spit) DJ.
It’s definitely leaning towards the C-list, but there’s a few well-known people there.