You have a beautiful list!! I don’t think [name_f]Lucy[/name_f] and [name_f]Louise[/name_f] are too common to retain a distinctive feeling, personally. (They’re both on my list!) [name_f]Love[/name_f] your description of [name_f]Louise[/name_f]! Agree though that [name_f]Juniper[/name_f] feels a bit like an odd one out here, more modern in a group of classic/timeless names.
[name_f][/name_f]I second the suggestions of [name_f]Frances[/name_f] and [name_f]Helena[/name_f]! Maybe also:
[name_f][/name_f][name_f]Pearl[/name_f]
[name_f][/name_f][name_f]Matilda[/name_f]
[name_f][/name_f][name_f]Viola[/name_f]
[name_f][/name_f][name_f]Celeste[/name_f]
Imagining some fun sibling pairs from your list:
[name_f][/name_f][name_f]Philippa[/name_f] and [name_f]Beatrix[/name_f], [name_f]Pippa[/name_f] and [name_f]Bea[/name_f]
[name_f][/name_f][name_f]Susanna[/name_f] and [name_f]Emmeline[/name_f], [name_f]Zuzu[/name_f] and [name_f]Emmie[/name_f]
[name_f][/name_f][name_f]Louise[/name_f] and [name_f]Tabitha[/name_f], [name_f]Lucy[/name_f] and [name_f]Tibby[/name_f] (love this nickname!!)
Some first and middle combos, just for fun:
[name_f][/name_f][name_f]Dorothy[/name_f] [name_f]Louise[/name_f]
[name_f][/name_f][name_f]Tabitha[/name_f] [name_f]Louise[/name_f]
[name_f][/name_f][name_f]Beatrix[/name_f] [name_f]Diana[/name_f]
[name_f][/name_f][name_f]Lucy[/name_f] [name_f]Emmeline[/name_f]
[name_f][/name_f][name_f]Marguerite[/name_f] [name_f]Rose[/name_f]
[name_f][/name_f][name_f]Willemina[/name_f] [name_f]Dorothy[/name_f]
[name_f][/name_f][name_f]Emmeline[/name_f] [name_f]Opal[/name_f]
[name_f][/name_f][name_f]Louise[/name_f] [name_f]Willemina[/name_f]