jason's the worst of the major slashers. just kind of boring compared to the rest. plus, he drowned as a kid and somehow his corpse grew into an adult after he was dead. i know most slashers break some laws of nature, but what the fuck is that all about?
He's definitely iconic. But his evil factor is much lower than Michael's. Jason seems more of a confused victim of circumstance than he does a malicious psychopath bent on killing. Whereas Michael Myers is probably the most terrifying concept of a human being. He is only driven by evil. Plus, the Halloween movies are genre-defining.