Hmm, it looked like the 'victim' wasn't screaming so much because of the knife thing but rather because the guy holding him down was humpin' him.
I guess any of the archers (Hawkeye, GL, Arsenal, etc.) should be pretty good at doing that, they're supposed to be accurate.
Aegis would be a good choice, he'd just use his forcefield and make it look like he's really good at it.
Hawkman, a weapons expert that can see a hummingbird's wings flap.
Bullseye is a no brainer.
Warpath.
People I wouldn't want to play it with:
Wolverine, he's too sloppy now. HE has a healing factor, I don't!
Nick Fury, Deathstroke or Ravager. One eye=poor depth perception.
Deadpool.
Sabretooth.