What are some sad solos for guitar?

I need a good solo from a song like Zakk Wylde's "Farewell Ballad" (can be found on YouTube) or the solo for "Warmness On The Soul" by Avenged Sevenfold and "I Won't See You Tonight Part 1" by Avenged Sevenfold. Know of any? They don't have to be rock, can be blues or even country, but preferably rock. Thanks!