Which killers could be 'beatable' unarmed?
Take their weapon away (if they have one, obviously we can't remove Hag or Demogorgon's claws for example).
Remove the extra buffs provided in the Entity's relam and put the killers in their pre-Fog state. Obviously some killers have powers besides their weapons that make them pretty much unbeatable (Pyramid Head for example).
Now looking at a one on one brawl, which of the killers could be 'beatable'? You could look at it from a personal level, or weigh up the chances of an 'average person' being able to defeat one of the killers. I mean David would be able to hammer the crap out of the Legion members, probably a couple at a time.
Let's start with the 'jobbers'?
All 4 members of the Legion wouldn't be an issue, especially the girls who are very small. They would be lost without their weapons. I expect they would of been too busy doing graffiti and committing shoplifting to do any combat training. They look like a bunch of trick or treaters.
Ghost Face strikes me as an 'average joe' and without a blade would find himself somewhat 'naked'. Look at some of the most famous real serial killers from years past: very few had above average physical strength or fighting skill.
The Clown was athletic back in the day, but currently is a physical wreck. Take away his knife and bottles...he's just a fat, out of shape old man. He may have good physical strength, but a swift punch to the gut could put him on the deck.
Amanda Young may look somewhat horrifying when donning a pig mask, but under that grotesque garb, she's simply a 107lb recovering drug addict. While occasionally volatile in the Saw films, she usually 'flexed her muscles' when her enemy was helpless or injured. Small of stature and with no known combat skills, she wouldn't cause many problems.
Deathslinger is quite tall, has obviously been in some scrapes, but looks absolutely knackered. He also has a bad wheel as illustrated with his leg brace. A sharp kick to that and he could topple.
Huntress obviously hasn't had any hand to hand combat training, and relies on her wild instinct and favourite weapons. Whilst she's physically imposing and would probably be quite strong, she could succumb to someone with a coordinated fighting style.
Leatherface is a huge man who has high physical prowess. But his coordination is nonexistent. He's another killer driven by instinct. Without his hammer and trusty chainsaw, he could be exposed to a crafty ball shot which would leave him him prone.
Now with the real killers:
Trapper is very strong and seems like he could kick some serious rear. His probably share's his father's love for fisticuffs.
Hillbilly is like Leatherface with attributes, but has diplayed he has high stamina. He's another feral character who has wild characteristics. His tolerance for pain could make him a formidable foe.
It would be difficult to subdue supernatural killers like Nurse, Wraith, Spirit and Freddy.
Hag would be too uncontrollable and would likely leap at you like a velociraptor and tear your throat open. It would be like fighting a rabid animal.
The Doctor has the ability to produce electric shocks. He could incapacitate you and then attack when your guard is down. He's also quite a large man.
Michael Myers is just too strong and can take an unbelievable amount of damage. He could snap your neck in a second.
Plague would just vomit from a distance and you would be blighted by the sickness. Tangling with Plague anyway would probably lead to infection, making her the human equivalent of a venomous dart frog.
Demogorgon could easily overpower most human beings. Like Hag, the Demogorgon is uncontrollable and would rip you to pieces in a frenzied attack.
Oni is a seasoned warrior and perhaps the most physically strong killer currently in the fog. He would have combat skills and could easily defeat most challengers.
Pyramid Head dies when HE want to or when the time is right. You could pound on him all day, it would just slow down your inevitable demise.
And forget about having a tear-up with the Entity!