Sharp Dressed Man
Down South Jukin'
I'm always a bit puzzled by the Southern Rock category, ZZ Top is Southern Rock?, I've even seen Kansas listed as Southern Rock on some compilation albums. I'm voting Allman Brothers because I'm not completely sure, but I think they either invented or defined the genre.
I think it's been discussed elsewhere and I don't personally consider ZZ Top southern rock either. Anyway, since the poll concerns classic southern rock bands, I had to go with Lynyrd Skynyrd, but I have to mention that I love most of the bands above. It's no secret that southern rock is one of my favourite genres of music.
The Marshall Tucker Band derserves to be mentioned, since I prefer them over a couple of names in the poll.