You are right, I’ve never heard of any of them.Some suggestions people may not have heard of before:
Pinkish Black
Miracle (relapse records)
Kylesa
Baroness
Code Orange
Slug
The Mars Volta
Atmosphere
Sa Roc
Chico Hamilton
Trash Talk
Clipping
DJ Blyatman
Vitalic
Feldub
Emma Ruth Rundle
Chelsea Wolfe
Run the Jewels
Bisou
Chelsea Jade
Cattle Decapitation
Caravan Palace
Brain Tentacles
Josh Pyke
Chon
Hail Mary Mallon
Eprom
King Woman
Jess and the Ancient Ones
Rainbow Kitten Surprise
Psycroptic
Corps Mente
The Horrors
Sons of Kemet
People Like You
U.S. Girls
Weekend Nachos
Still Woozy
AC Slater
Chase and Status
What genre/genres?