Yeah, most modern divers watches are about as dressy as a g_shock... Watch nerds just recommend them as dressy because they are shiny and often expensive. never mind the fact that they are grossly oversized and won't even fit under your cuff. Granted, it also depends on your idea of dressy and choice of clothing.
For your situation and MY preferences I'd find a watch with a slimmer height, larger dial with narrow bevel, and a simple dial with fewer complications to muck it up. 100m rating should do you fine.
Granted, comically oversized watches are becoming the norm, and if you are like most people whose idea of dressy is limited to church, summer weddings, and maybe a job interview, then just about any analog watch with either leather band or metal bracelet would work. Hell I'm thinking about wearing a vostok amphibia with its untouched Soviet styling from decades past, far from dressy, to my cousins wedding for fun. Plus, who can talk bad about a sixty dollar automatic watch with a 200m rating and bulletproof Russian movement, made exactly a it was forty years ago...