For sure derm. Plastics second. They have a couple who go over the top like a hot shot, but in general, surgeons don’t dress up as much from what I have seen. Also they wear scrubs relatively more of the time compared to derm. Derm is mostly clinic, so most dress like a player everyday with a few scattered days of scrubs from what I’ve seen. The vast majority of male derms seem to wear Gucci shoes in my experience - even on scrub days. Women derms also dress up a lot, maybe more than their male colleagues - I’ve seen Gucci, Chanel, lubs etc. Every specialty has their high end dressers and slobs, but on average I’d say derm wins for the high-end:slob ratio, and has lots of clinic time to actually wear those things. This image comes to mind regarding “what sock” is what specialty:
http://gomerblog.com/2015/06/medical-specialty-part1/dermatology-meme/
Oddly, I’ve also found neurology to be reasonably dressed.