That is some interesting input, Joe! All of the reviews I have read about the Vee, pretty much rave about the comfort of the seat and riding position.
What bikes have very comfortable stock seats - besides the 'Wing? I have *not* limited myself to "Adventure" style bikes. They just seem to offer more of what I am looking for - ample power, comfort, and weather protection.
Over nearly 43 years of bikes I am still apalled at the inability of the motorcycle industry to build a really decent stock seat.
It is, to a point, a matter of expectation. My idea of a riding day is around 400 miles, give or take a little. Thats going to be around 8 hours in the saddle no matter how you slice it. A lot depends on what you wear, the weather. For example on a hot day you sweat, the seat doesn't breathe, if you have on normal underwear it eventually starts to bunch and chaff as it gets damp. I wear a product called LD riding shorts, pretty much a bicycle short without the padding, the material does breathe and it makes a huge difference in comfort over the period of a day.
As for the seat, IMO the best seats pretty much look like an old tractor seat and are level. The name of the game is support and minimal pressure points and that is what works for most people. Notice that the best aftermarket seats, like the Russell, follow this pattern of shape.
Thus, to answer your question, the best stock seats are likely on a Wing, maybe the BMW 1600 or some of the older full tourers like the BMW K1200LT. It is possible something like an FJR1300 is okay. My Concours is a sport tourer and is a very comfortable bike in many ways but the stock seat for the rider is not very hospitable, doubt the passenger section is either.
My thought is to always get the bike you want and worry about something like the seat later. At worst you can replace it with aftermarket or have it redone by somebody like Rick Mayer, cost is going to be perhaps in the $400 area but then you have a much better seat than any factory ever put out.
It is also possible that if your expectations are to only ride 100-200 miles a day that you guys might be perfectly happy with the stock seat and think Joe is crazy as hell and this is the best seat ever.