What if darth vader had a much angrier voice?

I think part of Vader's menace was that his voice was as even-keeled as it was. Dressed all in black, no facial expressions, no real tonal changes to his voice. Everything about him was mechanical and unknowable. He was just this evil... thing. Which, if you take the first movie on its own and imagine that movie without Empire or Return to color it, that's all Vader was. You had no idea who he was, but you knew the instant you saw him that he was a bad hombre.

Also, now when I watch Star Wars and see Vader's entrance where rebels are lying on the ground dead, shot by stormtroopers (?!), Threepio and Artoo scurry across the hall in the middle of a firefight and the door at the end of the hall opens and Vader walks through while Stormtroopers who were literally in the middle of a firefight are so scared they snap to attention, I know that like fifteen minutes before, he was flat murdering the frick out of a corridor full of rebels. And, yet, there he is flat and without affect.