I think the 'mostly level top tube' stuff is a given. I personally think a classically styled bike made before Suntour died would fully qualify. If I had a Rivendell or a Heron or whatever else that exuded those qualities- I'd consider them "in" here.

I'm actually saddened that there's people with beautiful Rivendells and Herons that don't post their bikes here because they think some may say "that's not C&V" or "Grant is bad" or whatever.