There was an article many years ago about how models and celebrities purposefully buy their denim jackets too small to button up. after I read it, I could spot the larger gap, and the way it was styled always looked good. Having said that, I do sometimes fasten a single button on older boutique denim jackets or engage the zipper. . . But those (dolce and gabbana, Roberto cavalli, etro, and
gucci) from many years ago are a few that I’ve owned that were usually contoured to the body. One of my favorite fitted denim jackets I bought at a tahari sample sale years ago. For older styles, or wFor body conscious denim brands like diesel (no idea if that brand still exists) try ebay NWT listings perhaps. For todays department store denim jackets, I have a feeling perhaps Lafayette 148 or Akris Punto, both of which frequently go on sale.