I think Thundergun and DG-2 are equaly as good!
The V-R11? C'mon, even the starting pistol beats that gun. It doesn't do any damage, it has low ammo, it's VERY easy to miss, and the effect isn't very useful as the zombies will only go after the human if he's closer to them than you are. If they made it work like the monkeys (that the zombies go after the human no matter what for maybe 10-30 sec) then it would have been useful. But even then, why not simply use the monkeys or even gersh?
But Scavanger is AWSOME!