If I were to CC tomorrow, it would likely be my 17 with either RCS or INCOG holster. Probably not the best CC gun available, but what I have on hand. I would look into carrying my PPQ, which is marginally smaller than the 17, but I currently only have an OWB holster for it.
If CC were more common (as in easy to get the approval/permit) here, I was planning on going with either a 19 or potentially a Shield.
I used to carry my HK UPS Compact 40 in a leather hip holster. That was the first gun I bought and carried while living in Washington. Neither would be my first choice today, but it did well when I used to carry that combination. Clothing was different in Washington though, with a light jacket or long sleeve shirt being common most of the year.