I know I'm going to get punked out on this, but Eddie Brock would be played very well by Brock Lesnar (appearance-wise. I don't know how good he'd be at professional acting). He's ripped out the ass, and would tower over Tobey. If you can think of anyone better, speak up.
http://www.cyclone2k.com/stars/brock.jpg
http://www.newulmtel.net/~jonanton/carnage/carhist3.jpg