Plant #1 looks like a tree-of-heaven seedling, Ailanthus altissima. #2 is some type of elm seedling, perhaps Ulmus parvifolia.

I have no idea what these plants are called, but I always pull 1 & 4 from my garden. I have not seen 2 or 3 in mine. I think 1 is a Sumac.

Ditto Ailanthus altissima, 3 is Cinnamomum camphora. 4 has opposite leave so not cherry.

I pull the elm seedlings all year long (similar zone). They grow quickly and look unruly, especially along fencelines. They take over a flower bed or garden. The sooner you can pull it out the better. Try to pull out as much root as possible. Sometimes I have to just cut off, but it always comes back from the root. Very hardy little plant. They spring up everywhere and are one of the signs of a neglected bed.
If #1 is a sumac it's a lot like the elm. Sumacs are ornamental, but can grow up to 10+ feet. They are lanky and tall. If they aren't kept cut back they take over and look disheveled.
Heidi in Nebraska

Maybe #4 is birch or alder?