IDs please

After weeding one of my beds this week I have come across a few things and I have no idea what they are! Should I leave them or pull them??




This last one is in one of my pots, it just keeps getting bigger lol

 

I thought the plant at the bottom of the first picture looks a bit like a fuchsia?

 

The only one I know for certain is no 4 which is an Allium ( ornamental flowering onion).

 

Sorry,not a Fuchsia , too herbaceous, could be a Lychnis or a perennial Lobelia.

 

That might explain the faint 'onion-y' smell while I was weeding lol

Hmmm, just wondered as it looks exactly like the fuchsia that's growing in that bed already

 

1 and 3 are willowherbs, which are wildflowers/weeds. I think 1 has a nice flower (greater willowherb), but it's too tall for the front of a bed and you don't want it to seed! 2 is red deadnettle, which is also a native wildflower. Personally I'd have them all out.
I'd guess Lythrum (loosestrife) for no. 5, rather than Lychnis (ragged robin). Again, a native and this one grows tall and is vigorous. As these plants are happy growing in your garden you could leave them for the wildlife to enjoy til you need the space, or consider letting your favourites flower.