How would you stat up the elements of the first two evil dead films?
So, we're talking:
Invisible, incorporeal malevolent entities.
Who possess the living and turn them into demons/ undead types. That are, you know, Evil.
The potential for getting better after said possession.
Living vines that grapple and strangle people (and, optionally, are quite rude to female people)
Zombies that talk and mock the living (the PC's). Which, optionally, can transform their bodies and sometimes fly.
A crawling hand. (okay, that one's a freebie).
Portals in time/space?
Haunts for the first, and assassin vines for the third.
The possessed need some kind of fast template you can apply, so you can modify stats during the game.
Or, if you'd rather, use shadow demons and magic jar.
Zombies we've already got, give them some evolution points like an eidolon, and you're done.