I'd have to go with McVay over Justin Price, despite the horrible acting of George Wendt. McVay's - as portrayed by Wendt (so maybe he does deserve some praise) - comes off as completely cold. He kills his own brother and shoots him in the back of the head to do it. Price has to cover up one death and strangle another. He's visibly shook by what he had to go through to kill Linwood. He plays it coolly (and is portrayed by a MUCH better actor than Wendt) but McVay is a cold, cold fish in the planning and execution.