Damage Multipliers
Wolfgang -0.5x Wimpy Damage
Wes, Wendy - 0.75x 25% Less Damage
Wilson, WX78, Wickerbottom, Woodie, Webber, Maxwell, Williow - 1.00x Normal Damage
Wigfrid - 1.25x 25% More Damage
Wolfgang - 0.5-2x - Extra Damage
Note(s) :
The normal weapon damage was obtained from the wiki, other weapons don't do confirmed damage, but effects their targets, so I didn't list them, these weapons are: Sleep Dart, Ice Staff, Fire Staff and Weather Pain
Explosives, tools, and traps were not used in this list.
Even More and Wimpy will depend on the amount of Hunger points Wolfgang is in,105 starts the 0.5 Wimpy Damage, 225 starts the 1.25x More Damage and 300 starts the even More x2 Damage.
Weapons
(Wimpy)(Less) (Normal) (More) (Even More)
Multiplier: 0.5 0.75 1.00 1.25 2.00
Dark Sword: (34) (51) (68) (85) (136)
Thulecite Club: (23) (45) (60) (75) (120)
Ham Bat: (15-30) (45-23) (30-60) (38-75) (60-120) Decreases 2.95 per day.
Tentacle Spike: (26) (38) (51) (64) (102)
Morning Star: (22-36) (33-54) (43-72) (54-90) (87-145) Based on wetness of the target.
Bat Bat: (22) (32) (43) (54) (86)
Spear: (17) (26) (34) (43) (68)
Battle Spear: (22) (32) (43) (54) (86)
Boomerang: (10) (20) (27) (34) (54)
Blow Dart: (50) (75) (100) (125) (200)
Electric Dart: (45-75)(68-113)(90-150) (113-188) (180-300) Based on wetness of the target.
This Information will be in the Don't Starve Wiki at the very bottom: http://dontstarve.wikia.com/wiki/Weapon