Monotone partial solution / progress-so-far

COTO ETHAB HY IS S TSIM WASBO YNGMMM

Monty Python
  - ETHAB - Eric the Half-a-Bee
  "1 2 3" (sung; also "1 2" and "1 2 3 4" spoken)
White Stripes
  - HY - Hotel Yorba
  "1 2 3 4" (also "4 5 6 7", "15", "39")
Sex Bob-Omb
  - WASBO - We Are Sex Bob-omb
  "1 2 3 4"
Radiohead
 - FA - Faust Arp
  "1 2 3 4"
The Police
 - IS - Invisible Sun
 "1 2 3 4 5 6" (spoken)
Gorillaz
 - TSIM - The Speak It Mountains
 "1 2 3 4 5 6 7"
The Beatles
 - YNGMMM - You Never Give Me Your Money  (though the puzzle said YNGMMM not YNGMYM. Typo, or clue?)
 "1 2 3 4 5 6 7"
Shel Silverstein
 - COTO - Crouchin' on the Outside
 "1 2 3 4 5 6 7 8"

Nth letter of artist / Nth letter of song:
N I
T E
B R
I S
L I
A A
T E
V N

NTBILATV
IERSIAEN
NITEBRISLIAATEVN
Notes:
 * The initials are in alphabetical order, and therefore their order can likely be discarded.
 * The artists appear to be in order of the longest continuous string of numbers starting at 1.There are duplicates of 1234 and 1234567.

Problems:
 * The puzzle said YNGMMM but the Beatles song is "You Never Give Me *Your* Money". I'm sure it's right though because it includes sung "1234567".
 * Even once we find songs with numbers in for all 8 bands, what then?