To begin, #3 is tricyrtis (toad lily). Plant.

#4 looks like one of the rudbekia. Plant.

#1 could be a lobelia, not sure which

#2 could be hosta

#3 could be asiatic dayflower

#4 could be echinacea (coneflower)

Some people consider Toad Lily to be a "weed". A "weed" is a plant you do not want growing where youdo not want it growing so whether something is a "weed" depends on you.
Do you want these plants growing where they are growing or do you not want them.?.

thanks for the responses.
@kimmsr, These are plants that were either in the flower beds when we purchased the house or sprung up this spring. As long as they are not weeds, I will keep them.