Any old (1980s) sport touring bike will do. I had my Raleigh Marathon set up as a backup commuter and it did a creditable job.
I wrecked that one, but have since gotten a Super Course that would be even better, I think, if I decided to outfit it similarly. Schwinn Travellers are great for the purpose as well as all the other bikes suggested in the thread. The way I see it, you can buy a new Rivendell, or you can pay a lot less for a bike that the Rivendells seek to imitate.