Your favorite screamer from a band?

I think you are asking this question to a different demographic than you are going to get. Mostly death metal and screamo band fans will answer this question. Try Dez Fafara from DevilDriver, or D. Randy Blythe from Lamb of God. Two best screamers in my opinion. Great examples for signature DevilDriver screams can be heard in the songs "Clouds Over California", "I Could Care Less", and "Digging Up the Corpses". Great examples for the Lamb of God screams can be heard in "Black Label", "Vigil", and, of course, "Laid to Rest".