My absolute favourites from each list are
Auden Violet
Felicity Wren
Linnea Fleur
Matilda Penrose
Olive Elizabeth
Stella Vivienne / Vivienne Grey
Thea Emmeline
Griffin Oliver
Milo Jameson
Rowan Theodore
Sawyer Brooks
Wyatt Julian
And also Magnolia, Gemma, Lux, Kate, Piper, Rosalie, Eloise, Asher, Graham, Evander, Hayes, Elliot, Penn and Wilder.
These would probably be more my style:
Gemma Lux
Rosalie Piper
Magnolia Kate
Piper Eloise
Evander Hayes
Graham Penn / Graham Wilder
Asher Graham
Hayes Elliot
Here's a few ideas.
For girls it seems you like quite classic and old fashioned names (Matilda, Elizabeth, Stella, Vivienne), and also quite nature-y ones (Violet, Linnea, Magnolia, Penrose, Grey).
But they're all quite elegant.
Elodie
Audrey
Francesca
Katharine
Beatrice
Nora
Juliana
Lenore
Edie
Georgina
Estelle
Sofia
Cecilia
Ophelia
Ginny
Helena
Lydia
Beatrix
Evangeline
Adelaide
Tallulah
Victoria
Rosalind
Juliet
Prudence
Clara
Maud
Arabella
Virginia
Penelope
Delphine
Charlotte
Mavis
Caroline
Hillary
Phoebe
Etta
Theodora
Primrose
Hazel
Lillia
Dahlia
Scarlett
Zinnia
Ruby
Wisteria
Gaia
Imogen
Pearl
Rosemary
Clover
Opal
Maeve
Lavender
Marigold
Briar
Iris
Roseanne
Nova
Laurel
Fern
Pembrook
Daisy
Luna
Clementine
Posey
Leonie
Camellia
Prairie
Ivy
Terra
Faye
Poppy
Robin
Garnet
For your boys, the same applies for elegance, but you seem to like quite surname-y names (Jameson, Brooks, Shepherd, Penn, Tate).
Wilson
Edison
Cohen
Amos
Deacon
Max
Elias
August
Evan
Beckett
Declan
Ridley
Levi
Cillian
Donovan
Davis
Warren
Conrad
Seth
Harrison
Reilly
Gabriel
Thomas
Caleb
Hayden
Lafferty
Bennett
Theo
Dean
Stone
Fletcher
Lennon
Gibson
Micah
Reid
Anderson
Nolan
Porter
Brennan
Zander
Owen
Mitchell
Roderick
Tristan
Samson
Brody
Archer
Leander
Russell
Jasper
Leo
Conall
Walker
Abram
Cooper
Judson
Broderick
Linwood
Keats
Wiley
Silas
Lawson
Gideon
Ellis
Warner
Sutton
Linden
Perry