What is the best band ever?

Really, can't name one. However, typically I would only list bands with proven staying power as some of the best.
That would lead me to this list:

The Beatles
Rolling Stones
The Who
Jimi Hendrix
Led Zeppelin (I'm not really a fan, but I know many are...)
Yes
Rush
Van Halen
Neil Young variants
U2
Pearl Jam

and my wildcard........

The Tubes

I'm sure there are many more that deserve mention......

Enjoy,

TIC

Dude, it's just impossible to pick one :)

Return to Forever, any Miles Davis ensemble, EARLY Fleetwood Mac (Peter Green), any John Lee Hooker ensemble, Beatles, Pink Floyd, Traffic, Steely Dan, Aimee Mann's groups, Radiohead, Wilco, and too many others to list!

60's Beatles
70's Led Zeppelin/Pink Floyd/Rolling Stones
80's Rush/Genesis
90's Nirvana/Black Crowes
00's Beck/Hold Steady/Kings Of Leon

Honorable Mentions: Grateful Dead, Phish, Boston, The Who, CSN&Y, Pretenders, Ramones, and Elvis Costello.

To me these were the greatest groups, but of course I could add many more to the list.

1.Beatles
2.C.C.R.
3.Skynyrd
4.Stones
5.Fleetwood Mac
6.Pink Floyd
7.The Band
8. Byrds
9.Travling Wilburys
10.The Strangers