I do as much cleanup in the fall as possible because spring is much more unpredictable as far as weather goes.
And I do 10 places , not enough time in the spring to get to everyone.
However I do not cut things back till I see them ready . You will notice the yellowing of leaves on much, that is the sign they are no longer taking in , and are ready. The main problem with fall clean-up is you may forget where some late emerging things are and plant over them. I suggest marking things or knowing your garden very well.
I do not have hellebores, but nothing else you listed is picky and should do fine being cut down. I would wait till the last week of September/first of October if possible. If you cut things like daylilies early they will try to reemerge. This will not kill the plant but unnecessarily uses energy.
