the first picture (your favorite, mine too) is Helebores,
http://www.hellebores.org/ The website should give you details on how to grow and maintain these absolutely lovely shade perennials. Around here, they bloom between Christmas and Easter which gives the garden some rare color when nothing else is able to bloom.
I will reserve comment on the other two. At first glance they do look like Euphorbia, but there seems to be definite flowers whereas Euphorbia is known for it's bracts. I'll have to check into these a little further.
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