The Band 
Creedence Clearwater Revival 
The Allman Brothers Band 
You have to be kidding me...Skynyrd gets voted out of a southern music competition? seriously....they have so many good songs.
just assuming it's the hate for "sweet home alabama"
on this site?
Perhaps I should have stressed at their peak versus any sort of weight that longevity might have on a discussion.
Of course, we could probably go into a lengthy arguments on the pros and cons of CCR along with those of any number of other great American rock bands. Ending with no one's opinion changed because music is, of course, subjective.