Whatever you do, get a Pastel Ghost/Hypo or Super Pastel Ghost/Hypo to pair with that humblebee. Don't let her go to waste and not pop out any visual ghost combos!
For the rest, Even something as simple as a Pastel Yellowbelly would make DRASTICALLY beautiful morphs. If you could find a yellowbelly firefly or something similar, that'd be what I'd do.