Here is a list of species and a short list of hybrids known to be fragrant ....
From
Flocking to Moth Orchids: Dummies
Phalaenopsis amboinensis: Musky fragrance
Phalaenopsis bastianii: Very fragrant
Phalaenopsis bellina: A very fragrant scent of lily-of-the-valley and freesia
Phalaenopsis fasciata: Light rosy-floral scent
Phalaenopsis gigantea: Scent of orange peels
Phalaenopsis hieroglyphica: Rose
Phalaenopsis lueddemanniana: Light sweet fragrance
Phalaenopsis mannii: Light scent of oranges
Phalaenopsis modesta: Honeysuckle or lilacs
Phalaenopsis schilleriana: Lightly rose-scented
Phalaenopsis tetraspis: Strong sweet scent
Phalaenopsis violacea: Spice and cinnamon and a bit of rose
Here are some of the sweet-smelling phalaenopsis hybrids noted for their fragrance:
Phalaenopsis Ambo Buddha 'SW'
Phalaenopsis Caribbean Sunset'Sweet Fragrance'
Phalaenopsis Dottie Woodson
Phalaenopsis Ember 'Blumen Insel'
Phalaenopsis Kilby Cassviola 'Sweet Fragrance'
Phalaenopsis Orchid World 'Bonnie Vasquez'
Phalaenopsis Perfection Is 'Chen'