...and NO ONE mentioned Frank Zappa?????
philistines, the lot of ya!

Ok, I'm assuming that we're excluding Jazz & Blues, and focusing on great
BANDS and not individual performers/songwriters, etc... so, in no particular order:
Frank Zappa - ANY band of his
Jimi Hendrix Experience
The Beatles
Traffic
Led Zeppelin
Steely Dan
The Meters
Parliament - Funkadelic
Sly & The Family Stone
any James Brown band of the 60s - 70s
Mahavishnu Orchestra
King Crimson
Little Feat
Velvet Underground
The New York Dolls
The Ramones
Humble Pie
Be-Bop Deluxe
The Clash
Elvis Costello & The Attractions
The Grateful Dead
The Police
Alice In Chains
Black Sabbath.... ONLY with Ozzy! Dio must be destroyed

AC/DC - preferably with Bon Scott
Pink Floyd, provided it stops with "The Wall"

Actually imho the Syd Barret floyd is the most interesting music of the lot.
Iggy & The Stooges
ZZ Top... BEFORE the fuzzy guitars came in!
... and many more that my memory won't produce on demand

now.... Bands that Must Die:
Journey
Foreigner
Asia
Boston
Rush (that one word could start a 300-post flamewar

Any leather/hair sporting 80s metal atrocity

any leather/hair sporting 80's "new wave" atrocity, with the exceptions on the above list
Abba
Styx
...feel free to add
