Zakk Wylde probably doesn't get enough recognition because of his style. Personally I like it. The reason I hold him as one of the top guitarists of all time is because he does things I haven't seen others do. His ability is incredible when he plays his guitar while it's angled straight up and down, and even behind is head. But I'm not sure if he can reach the speeds that the elite can reach (John Petrucci for example).