Very nice looking blooms Todd, love the white of Ron Williamson and of course the pink/reds of the Burrageara and fragrance is a bonus. I find that most of my Oncidium Alliance have fragrance although usually very mild, I have even noticed a very weak fragrance from my Psychopsis at certain times.
One of my many Beallara Peggy Ruth Carpenter 'Morning Joy' plants. It develops a quite a bit more color under lights and is mildly fragrant, a sweet spicy peppery scent like the colored peppers used in a pepper mill.