They have to be good, but don't have to be well known. What have you got? I've just [re]discovered this Columbian singer who popped up on my SoundCloud feed a while back: Kali Uchis. I listened to all of her tunes the last time then completely forgot about it/her. She's just popped up again today and I've been having a listen. She's pretty good: it's funk/soul and reminds me a bit of Amy Winehouse, but with better music. Spoiler: I Know What I Want And she's never been mentioned on Urban before.