If you don't mind switching backs, then just about any of those cameras will be very fast. Otherwise, I think Mamiya 7, or Bessa III (Fujifilm GF670) would be be very fast, as you're used to load a Bessa range finder.

Rolleiflex is not too bad, but I'm a lot faster loading my Zeiss Ikonta III than my Rolleiflex.

For ultimate speed, get a camera with swappable back, does not really get any faster. Hasselblad is good for that as it won't let you remove the back without putting in a dark slide first, I'm not sure about other cameras, but my Fotoman with Graflock back does not have such niceties, and you can easily take of the back and ruin the film.