#1 appears to me to be Epilobium angustifolium, commonly known as fireweed (or maybe great willow herb to you). I'm already pulling it up in my yard this spring. I love it, just not in my gardens!

Here is a link that might be useful: info on fireweed

And #3 looks like Maianthemum dilatatum to me.

Here is a link that might be useful: a picture

Could the second plant be Campanula glomerata?

I'd go for my old favourite Hesperis matronalis for no.2.