I'm setting out to mathematically dispel some of the assumptions out there, so within the next few days I'll have a detailed sheet for all of the base classes damage. But right now, Rose, Sunflower, and Scientist all 3 do 40 DPS for body shots, while the Engineer is around 22-23 DPS with body shots and 32 DPS with head shots.
So far, it seems that the Dev's set out to balance the classes around 40 DPS, so that's what I'm guessing the rest to be at or near. Right now, there's a problem though with people thinking that big, single, yet slow shots deal more dmg than much faster, lower dmg shots, which over the course of the same amount of time it takes to fire a couple slow shots ends up dealing at or near the same damage.
Hopefully, math will win out over opinion, but, it will take a reasonable and rational mind to accept that over "feelings".