Jimmy "The Rev" Sullivan
So what if he overdosed before Avenged Sevenfold became big. He was still the centerpiece of the early stages of the band. He had crazy footwork, and fast hands. He had a technique he called the "double-ride thing."
He would double up the tempo between the ride and double-bass drums. This can be found in a good portion of the songs including "Critical Acclaim." He also knew when to tone it down when he had to.
You can hear him slow down and simplify things throughout the progression of albums he played in. Writing songs from their first five albums "Sounding the Seventh Trumpet," "Waking the Fallen," "City of Evil," "Avenged Sevenfold," and "Nightmare."
Some of the songs he wrote include "Almost Easy," "Afterlife," "Welcome to the Family," and "A Little Piece of Heaven." Not only was he the drummer of the band, he recorded vocals and piano parts in about a third of the songs.