The photo posted above is some sort of dock: I would identify it as curly dock -- except that I've never lived in your area and have no idea if other, similar-looking docks might grow there. Here's curly dock (Rumex crispus):
http://www.cas.vanderbilt.edu/bioimages/species/frame/rucr.htm

As far as "almost veggie-like" goes, you will find claims online that the North American Rumex species are edible. I cannot vouch for that, and have never attempted to eat any.

The plant with the carroty foliage is something else. I can't say exactly what it is, but it is definitely not dock.

The plant in the last photo is something that is neither the dock nor the carroty-foliaged thing. It looks like it's been stomped on, and you say you used Roundup; since it doesn't look like it normally would, it's more difficult to identify. Certainly I can't tell you what it might be.

If you don't get an authoritative answer here, post photos of uninjured plants on the Name That Plant forum, and the gurus will doubtless identify them quickly.

Photo 1:

Could possibly be hemlock, so don't eat it. But, there is plenty of look alikes to poison hemlock, so, don't freak out until you've verified it yourself (but don't eat it either). However, I live right up next to a greenbelt and it is pretty common around my house.

Photo 2:

I have a hard time telling since it's all mangled.

Photo 3/attached image:

I agree, dock (Rumex spp.). Can be edible, but I wouldn't just starting eating weeds out of the lawn until I'm absolutely sure of what it is. Some dock is edible, like curly dock, but, the leaves of it's more famous cousin, rhubarb are not.

Thank you! I won't be eating any of them, but this will help me cater my attack plan :)

I would make sure to wear gloves and wash my hands thoroughly after handling the one that looks like hemlock. Even if it is, its probably an over precaution and I'm just being alarmist, but, that stuff has a pretty scary reputation.