I’ve similar proportions to you op and could have written Justgottokeeponkeepingon’s post and I’m 5ft 8 and a half.
Tbh, I have given up wearing summer dresses. I find revealing skinny legs under enormous boobs and big tum just looks wrong on me. Like a pumpkin balanced on two straws! 😃😃. It balances out in winter when I can wear sturdy long boots under a dress but not in summer somehow.
So I stick to tried and tested formula of very wide legged trousers and a tightish jersey or ribbed top, sometimes with a collar, but always with a deep v. Ribbed is good because it allows you to
go in and out! Stick to plain darkish colours for work especially; no florals ever.
I sometimes sew up the button line of a fine ribbed v neck jumper or add a lacy placket at the bust to a v necked top. I don’t try and hide my bust, I just clad it carefully and wear very good bras.
You can put together all sorts of versions of this look :
**very casual beach wear outfit: well cut pocketless linen wide legged trews, t-shirt, wide linen scarf worn as pashmina m, maybe long linen shirt
**office - wide leg M&S pants with wide collar ribbed polo shirt with deep v
** wedding - very wide leg crepe trews with draped front vest thing with long crepe blouse or loose cardi-jacket or those jackets that looks like capes
You have to be careful not to go too hippy and drapery because at my age one just looks a busty mess so work hard on other areas eg have sharp haircut, no grey roots, always good shoes, accessories and manicure. And bracelets are important if you have a big bust. Attracts eye to thinnest point!
Sorry op - that’s probably not much help if you are after dresses - but good luck with your search!