These flowers are tiny. I have no clue what plants 3 and 4 are. We are letting 2-4 grow in the community garden bed for now; I'd hate to get rid of it only to find that it's something useful. I told my mom I knew 2 wasn't a weed but I wasn't sure about the others. Then I told her I'd ask my gardening friends online and they would probably know!

They are copious reseeders and form tuberous roots that overwinter here in zone 9.

Looks like a ZZ plant, Zamnioculcas zamifolia, but I've never seen one arching down like that. Does the pot have a hole? The Coleus also in the pot will want water more often than this plant. not really compatible to share the same pot.

You need a cutting or better yet, a division of it so you have roots ready to go. I got a division from my parents 30+ years ago (my grandmother's funeral) and I still have it today in a very small pot so it is constrained to grow and do as well as it can. Here is what mine came from. What mine looked like five years ago (I don't take many pictures of it after a few years). In tropical areas and planted in the ground, they become very large. Or even in a greenhouse in the ground. This next one is at a florist shop in metro Atlanta. They seem to be a landscaping plant in Florida, southern Texas, etc.