There was a photographer in Minneapolis in the early 2000s, by the name of Jeff Kreuger, who received grant money to travel around the United States to photograph famous trees.

He shot Velvia if I remember correctly, over-exposed it, and drove the guys running the film line nuts by asking them to use minus-development. With the Refrema you only had so much play regarding the time in the developer, which meant they had to run into the dark processor and manually lift the hanger back a couple of notches.
He did, though, bring out an astounding range of tones from those sheets of 4x5. I can't recall seeing Velvia ever look quite like that again.

It may not be perfect, but it entirely altered how Velvia looked.

With that said, my recommendation would be for Provia (or Astia, were it still available).