Bands that are currently on the main stage that I have seen on the secondary stage of NOS Alive:
Idles
Cages the Elephant
Royal Blood
Blossoms
Two Door Cinema Club
Father John Misty
Kodaline
Wolf Alice
Metronomy
Johnny Marr
These are bands between 2015-2020
Nobody knows, I would say these are likely to be roughly equivalent, but it depends where you work!
Edit: it also may not depend where you work. Nobody knows! Argh!