Wild plants you have used.

Yarrow has long been one of my go to wild plants for all the uses you mentioned. I've made tincture with it and used it for it's bug repellent properties. Even transplanted some to the edge of my yard so I'd always have a known easy source.

I don't get poison ivy but have plenty of friends who do and I often use jewel weed to treat their itchy rashes. Mashed and used as a poultice works while I brew a tea of it and wait for it to cool, then use the tea for repeated cleanings of the affected area. A good friend has his own cottage industry handmade soap business and he makes a soap using it for use by poison ivy sufferers, several people like it enough that they use it regardless if they have a rash or not.

Had a batch of sauteed Dandelions with garlic and red pepper flake just the other day.

There is something about the bitter flavor that works well with the garlic - like Mustard greens but without the heat.
I have wild mustard growing in relative abundance and I sampled a leaf - peppery. One day soon, I will do the same with them using plenty of garlic...

Not sure if your Garlic Mustard and my Wild Mustard are the same. The plants growing out back look like pestid.msu.edu/wp-content/uploads/2015/01/Wild-mustard-plants.jpg

Plants that I have harvested and eaten; Morels, blackberries, cherries, persimmons, hazelnuts, and wild onions. Likely some other stuff, but those are the ones I can think of off the top of my head. At the risk of being called crazy, I love to hunt mushrooms, but don't care to eat them...luckily my sister loves them. 

Plants that I have harvested for medical purposes; I used to harvest jewelweed as a poison ivy remedy for my dad. It is a common plant in our area that can be found in the bottoms or ditches and is easily identified by its orange flower. Typically the joints are segmented where branch shoots off the base stem of the plant. I would cut out the segmented part and crush it to get the moisture or juice out of it. Dad would apply it to the effected area and the poison ivy would dry up the blisters and heal much faster. He claimed it worked better than anything he could buy over the counter or get at the Dr. Office. We learned about this treatment at a Native American gathering at the damming of the Kaskaskia River (Lake Shelbyville) long before the internet. Jewelweed can be harvested, made into ice cubes and saved for the next year to combat that pesky early season poison. 

Yarrow grows in only one place in the forest that I have found so far.
Blackberries of course, cats ear, Dandelion, cattail, apple berry, nettles, dock, Lambs Quarters, Plantain, Goonagurra Flowers. That is all I can think of off the top of my head in regards to plants.
Keith.