Have you tried a bralette yet? The smooth silhouette makes this one a comfortable alternative to a more structured bra. From Feather Bra.
Feather Bra Scoop Wirefree Support Bralette
Flexible Fit Triangle Bralette
Feather Bra Scoop Bralette
Bali Comfort Revolution EasyLite Shaping Wireless Bra DF3491 - Macy's
Feather Bra Scoop Wirefree Support Bralette on QVC
Feather bra Bras for Women - Poshmark
Yellowberry Scoop Back Bra Light to Medium Support and All-Day Comfort
Downtime Wireless Bralette
Hanes Women Ultimate Comfy Support ComfortFlex Fit Wirefree Bra HU11
Feather Bra Scoop Wirefree Support Bralette
Yellowberry Scoop Back Bra Light to Medium Support and All-Day Comfort
Shop Everyday Bralettes - Lounge Scoop
Wireless Bra Wirefree Limitless Bra for Small Busts – Pepper
Rich Mocha Bralette // Ultra Comfy + Seamless Bralette // EBY™
Feather Bra Scoop Wirefree Support Bralette