Jason comes back to life again as does Michael Myers. It's never the issue of briefly killing these demons, it's keeping them dead that's the issue. Dante would have to figure out how to properly destroy Jason and Michael, in terms of keeping them from being able to resurrect themselves.
Freddy wouldn't really be an issue. For the same reason as above. It's not about killing Freddy. Freddy is already dead. It's about keeping him from resurrecting. Dante would have to travel into Hell to seal them there for good. Dante would have the ability to retaliate in his own dream, as Nightmare On Elm Street 3 reveals to us. And Dante would suffer mere cut wounds from Freddy. These cuts would be happening to Dante's strong demonic body, meaning Dante would just be able to take the wounds without really giving a damn.
As for the other human serial killers, Dante would defeat them all without battering an eyelid.
Freddy wouldn't really be an issue. For the same reason as above. It's not about killing Freddy. Freddy is already dead. It's about keeping him from resurrecting. Dante would have to travel into Hell to seal them there for good. Dante would have the ability to retaliate in his own dream, as Nightmare On Elm Street 3 reveals to us. And Dante would suffer mere cut wounds from Freddy. These cuts would be happening to Dante's strong demonic body, meaning Dante would just be able to take the wounds without really giving a damn.
As for the other human serial killers, Dante would defeat them all without battering an eyelid.