Interesting Mel Blanc/Star Wars story: George Lucas originally envisioned the character of C-3PO as "more of a con man" with an American accent, but changed his mind. Actor Anthony Daniels was initially hired only to physically inhabit the robot's costume. But he later also got the speaking part after his voice performance outshone that of 30 other actors that tested for the role. Mel Blanc helped in that decision. Blanc was one of those considered for the voice over role, but according to Daniels, Blanc told George Lucas that Daniels was better for the part.Mel Blanc
I always thought Jim Morrison was a good screamer.How about Best Scream?
Robert Plant.
Pete Townshend.
Faye Wray.