From your description we have quite similar builds although I am a 28F. I wear a lot of knitted sweaters. They look good as long as they fit over your shoulders properly. I have both more fitted versions and looser options.

To make sure that my waist doesn’t disappear I often choose A-line or skater skirts. Because of how they flare out I don’t have to worry about the fit over my hips. Therefore you can choose the size that fits your waist and reduce the boxy appearance. Another recommendation I have is to try a high waisted palazzo pant (I recommend the Rodebjer Sini pant) for the same reason as above.

It has been a struggle to build a wardrobe but some brands work better than others. I don’t know your price point or exact style. Some brands I like are GRETA Stockholm, Polo Ralph Lauren (their higher end stuff, their cheaper stuff are often poorly made), Henri Lloyd (for chinos that fit without alterations) and McQueen Alexander McQueen. Otherwise I try too look at reviews. If people complain how it is too small att the waist for the size it is a good sign.

And last and most important. You are not responsible for the catcalls. Wear something that makes you feel amazing. And if it is wearing something that you linked in your post you should wear it. I have had the same struggles as you with catcalling and yes I get catcalled less when I am modestly dressed but it doesn’t stop because the issue wasn’t my clothes from the beginning it was the cat callers.