Freddy wasn't a pedophile, he was a child killer. In the remake he is supposed to be a child molester, but classic Freddy was just a murderer. Anyway my favourite is without a doubt Jason.
a. His backstory is so tragic and he comes off as a sympathetic character which is a rare trait for a slasher villain.
b. All his victims deserve to die. Either they are just painfully stupid or a horribly cliched sterotype from the era the movie was made. Often they are both. Combined with the above, I find myself cheering for Jason.