Matt, Im not sure I'd through Mid-Pines in the mix before No. 2,
Sure the routing on Pinehurst's best has changed since its opening, Ross worked on it himself for a good 30 years, but there are no real weaknesses in my mind. Green to tee walks are very short, even for a classic that has been lengthened a bit for championship play. The playing corridors here are plenty wide and rarely are balls lost, a fabulous trait for a tree lined course. Ross doesn't squeeze 1,9,10 and 18 in front of a clubhouse, it wanders around finding the pines looking for optimal strategic interest. The course is constantly changing directions, even the stretch with 4 straight par-4's all play in different directions. There are some many great stretches you could argue all day where the best 3 consecutive holes on the course are. Due to its location and routed for strategic purposes rather than aesthetic, the flow of a round here is one of my favorites.
One thing I noticed when thinking about my favorite Tillinghast (my fav classic arch) courses, that routings are not his strong point. WF, Baltusrol and Ridgewood are to impersonal and can be cramped individually although amazing design given the task of creating multiple courses. QR has a Murifield routing but with the first 8 holes OB right, even I wouldnt argue the routing great. BPB crosses roads and is a noted hard walk, although Tilly definitely figures out to use the best parts of the property here very well. Im not a big fan of the overlaps and crossovers at Fenway... Im interested to see SF and Somerset, I have a feeling they may be his best routing efforts.
From what I've read, seems like a few Maxwell routings probably belong on this thread for incorporating local high points into his minimalist design and the pin wheel layouts too.