The 1st is Trifolium pratense Red clover.

2nd needs better pics but possibly Polygonatum or Maianthemum not JL.

3 is Jack in the Pulpit

4 is Lysimachia ciliata and it is very aggressive.

Photo #2 also appears to have some Lamium galeobdolon, aka yellow archangel, growing in the 10 o'clock position. This is a very aggressive spreader, considered invasive in many areas. I'd remove ASAP.

The other plants with the Solomon's Seal are White Snakeroot, Ageratina altissima. They get large and will crowd out the SS. White snakeroot is native, but it's very weedy and will form a monoculture if left to itself. Packera aurea in bottom pic with Lysimachia. I don't allow any White Snakeroot in my beds. There are billions of them in my area and there are nicer plants that attract the same pollinators like perennial ageratum, Conoclinium, Eupatorium, Eutrochium and Brickellia species. White Snakeroot is also quite deadly, but animals know not to eat it.