Honestly I think your style is absolutely lovely and [name_m]Percy[/name_m] & [name_f]Honey[/name_f] set the tone so well already 
A few names that immediately came to mind were [name_f]Clementine[/name_f], [name_f]Marigold[/name_f], [name_f]Opaline[/name_f], [name_f]Rosamund[/name_f], [name_f]Odette[/name_f] and [name_f]Cosima[/name_f] for girls, and [name_m]Ambrose[/name_m], [name_m]Peregrine[/name_m], [name_m]Cassian[/name_m], [name_m]Florian[/name_m], [name_m]Sylvan[/name_m] and [name_m]Leander[/name_m] for boys. They all feel whimsical and vintage without being too matchy.
From your own list, I’m especially obsessed with [name_f]Delphine[/name_f] [name_f]Louise[/name_f], [name_f]Olympia[/name_f] [name_f]Dove[/name_f], [name_f]Ottilie[/name_f] [name_f]Clover[/name_f], [name_m]Caspian[/name_m] [name_m]Emrys[/name_m] and [name_m]Isidore[/name_m] [name_m]Griffin[/name_m]. They feel like they’d fit perfectly alongside [name_m]Percival[/name_m] [name_m]Wilder[/name_m] and [name_f]Primrose[/name_f] [name_f]Honey[/name_f].
I also think you’re right not to hold back because something feels “too extra” for a hypothetical future child. If [name_f]Whimsy[/name_f], [name_m]Cygnus[/name_m] or Coppélia genuinely make your heart happy, I’d keep them on the list! [name_f]Name[/name_f] nerd spaces can sometimes make us overthink wearability when real people use all sorts of names every day.
Also can I just say [name_f]Pomeline[/name_f] is such a gorgeous find and I don’t see it mentioned nearly enough 