Not sure if you are interested in an Alliance guild. I represent the weekend team of Vigilant on Sargeras. We are a 4/8M team. We raid Sat/Sun 8-11pm CST with an optional Friday heroic clear, same time. There is more information below, including our website. My Battletag is MightyMal#1583 if you would like more information.
Thank you for reading and best of luck in your search!