Okay first i would like to take a second to slap everyone for not including the:
Alman brothers or Skynyrd.... midnight rider and one way out .......freebird and i never dreamed .....

you people i swear! but thanks for the refreshing hits on bands i forgot, like the dire straits...i would also like to include these for you listening pleasure

Emerson lake and pamer -from the beginning
Moody blues - In the end
Steely Dan - Reeling in the years

there is no way to tell the best rock song.......it's like saying "what's the best flavor of ice cream"