I have narrowed my choices down to a few but I haven't physically tried any of them so maybe people can chime in:

(1) Velo-Orange/Nitto Montmartre Handlebar

These are classic French porteur bars, relatively narrow at 42cm, center to center.



(2) V-O/Nitto Promenade
This one features rise. There are non rise bars available too. 48cm center to center.



(3) Velo-Orange Tourist Bar

These are the widest as 54cm center to center. I would be very comfortable but it lacks the narrow profile of the others, which allows me to snake through traffic relatively easily.