Here me out... Hammer

quack_basilisk

It's really a dumb idea, but simple. A killer with a hammer, or a blunt weapon. His mechanic is that he knocks people around with the hammer, causing people to stumble after getting hit or after an ability. That little grace period survivors get after being hit is hampered because they're sent in more of a random direction. If you don't want to mess with the grace period, there's plenty other mechanics that can be born from blunt force. Feel free to add more possible bonking mechanics.

... Thats it, that's all I got