The last one looks like black walnut, but a closeup of the compound leaves will help confirm an ID. I agree that the top two look like blackberries. Quality of wild plants can be hit or miss, but even if you don't like them the birds will. Blackberries can get invasive, though.

Considering what we would be looking at if we removed them... Id rather have them. Atleast for now. I wouldn't want to remove them untill I could replace them with something else. Our yard is fairly large and we basically had to start from scratch. Eventually all the natural areas will be cleared(except the trees) and replanted but it will take lots of time and money. Im focused on other areas right now.

Can you provide a close up picture of the leaves? Also, you could cut open a fruit and see if it has a single seed (like a cherry does) or multiple small ones (like a crabapple, for instance).

Good detective work, kazoonative! Uconn is a great website. Autumn Olive is indeed classified as invasive in many states in the mid-west. People don't always see the effects of a plant's invasiveness around them. Some plants invade by runners, some by windblown seed - these types of invasion are more noticeable locally. Plants with berries (like this one) are usually spread by birds and the seeds can be dropped far from the immediate area. My neighbor has elaeagnus (not this one) and the birds deposit the berries in my yard - I pull out 5-6 seedlings a year. If I didn't, I'd have quite a few of these bushes already myself. Here is a link that might be useful: elaeagnus umbullata invasive information