I have barely explored all the phals there are but based on my research mainly from here
https://www.canadianorchidcongress.ca/Fragrant.pdf
The main fragrant phals are:
P. Violacea - flowers all year long, malaysia varieties have more flowers and longer flower spikes, there are also lots of lovely hybrids like the purple martin hybrid which is one of the best violacea hybrids in my opinion
P. Bellina (smells like floral lemon) flowers all year long
P. Modesta
P. Speciosa
P. Schillerina
P. Lueddemanniana
P. Corningiana (smells like cinnamon) flowers in SPRING, possibly again in Autumn
Those are the strongest smelling ones apparently but there are lots of other fragrant ones too. I think Mariae can be quite powerful because a healthy plant will produce lots of flowers.
The liodoro 'sweet memory' is a bellina or violacea hybrid that produces much more flowers than a Bellina ever could so although I haven't smelled it yet I have hear lots of good things about the liodoro too.
Also just as a sidenote possibly the sedirea japonica should make the list, it has now been reclassified as a phalaenopsis.
further reading:
Orchid Fragrance Information
The Scents and Smells of Orchids ❀👃✾ | ✿❀ Queensland Orchid International ❀✿