that´s too hard decisions
1)......Green Day i guess, but VERY CLOSE
2)......Beatles
3)......again VERY CLOSE, maybe even closer than Green Day vs Led Zeppelin, but i go with Linkin Park
4)......Red Hot
5)......Pink Floyd
6)......Bob Dylan
7)......Jimmy Hendrix
8)......The Eagles
9)......Nirvana
10)....Mettalica
11)....The Killers
I don't even like Led Zeppelin, but saying green day is better than them is an insult.
The same goes for Linkin Park being better than Queen... Queen is one of the greatest rock bands of all time, and had arguably the greatest singer of all time.
Not trying to knock on you, you may be too young to have begun listening to older music and actually appreciating it.
The old own's the new.
Led Zeppelin VS Green Day - led Zeppelin, this is so one sided it's unbelievable
The Beatles VS Foo Fighters - The Beatles, Foo Fighters are not even worth the comparison
Queen VS Linkin Park - Lol, Queen.
The Who VS Coldplay - The Who are probably the second best rock band of all time behind The Beatles
Pink Floyd VS System Of A Down - SOAD is alright, but Pink Floyd is much better and more original.
Bob Dylan VS Staind - ...Bob Dylan
Jimmy Hendrix VS Audioslave - Once again, no comparison. Jimmy Hendrix was a guitar genius, one you see once in a generation. (Although Jimmy Paige, Eric Clapton, and George Harrison were close

)
The Eagles VS Radiohead - The Eagles
Nirvana VS Sum 41 - Once again, not even worth comparing. Sum 41 comes no where near Kurt Cobain.
Metallica VS Nickleback - Nickleback vs Metallica? Lol, Mettalica.
R.E.M. VS The Killers - The Killers, I like their music somewhat
Red Hot Chili Peppers VS Nine Inch Nails - Red Hot