First off, congrats on the weight loss and good for you...!
Next, you look pretty darn good to me proportionately, to begin with actually.
Yes, making the "v" taper working lats and shoulders for more muscularity can certainly create a bigger ratio difference or add to that illusion.
Lastly, practice being okay with what you might picture as a shortcoming!?, and will free you up to go have fun in the gym and just workout and get into your best shape you can be.
*All that said, (me personally, since I do not have the widest shoulders) I would still be inclined to work the entire body and especially the lower body legs, back and hips, since those exercises hit the largest of the body's musculature and makes the biggest differences in mass gains, strength and all round better fitness & function. On top of the fact, that the big 5-7 compound exercises powerize the look and muscles of the entire body, making it all look stronger and fit together from head to toe.