Having worn uniform all my working life I'm not going to enter this debate which, from what I can make out seems to involve just the gentlemen of the species. I have just a couple of suggestions to make, one is the shorts suit. I was once passed by a very smart-looking businessman in Perth West Oz. He wore beautiful shiny black brogues which would have pleased any nit-picking Sergeant Major, carried an equally smart briefcase and brolly and wore a shorts suit - tailored shorts and jacket, cream knee-length socks and the whole outfit surmounted by an immaculate bowler hat.
Shorts Suit (ignore the footwear):
Should this not be quite to your taste you could always go for the Lord Mayor of London look.