Index of artists, ordered by quality of their 20th best song

The Beatles
Bob Dylan
Rolling Stones
Prince
Aretha Franklin
Van Morrison
Marvin Gaye
The Beach Boys
Elvis Presley
Madonna
Miles Davis
Neil Young
The Clash
Public Enemy
Stevie Wonder
Jimi Hendrix
R.E.M.
Elvis Costello
Talking Heads
Bob Marley
The Velvet Underground
The Who
Joni Mitchell
PJ Harvey
Bruce Springsteen
Nirvana
Radiohead
David Bowie
Drive-By Truckers
Björk
The Kinks
Pink Floyd
Michael Jackson
Led Zeppelin
U2
The Byrds
The Doors
Siouxsie and the Banshees
The Smiths

Siouxsie and the Banshees

Including solo Siouxsie but not "Cish Cash", plus I never listened to The Creatures. Tumblr notes.

1. Happy House (Kaleidoscope)
2. Hong Kong Garden
3. Melt! (A Kiss in the Dreamhouse)
4. Into the Light (Juju)
5. Spellbound (Juju)
6. Jigsaw Feeling (The Scream)
7. Mirage (The Scream)
8. Cannons (Tinderbox)
9. Dazzle (Hyaena)
10. Arabian Knights (Juju)
11. Heaven and Alchemy (solo, Mantaray)
12. Party’s Fall (Tinderbox)
13. Cascade (A Kiss in the Dreamhouse)
14. Cities in Dust (Tinderbox)
15. Voodoo Dolly (Juju)
16. Green Fingers (A Kiss in the Dreamhouse)
17. Dear Prudence (Hyaena)
18. Christine (Kaleidoscope)
19. Carcass (The Scream)
20. About to Happen (solo, Mantaray)