hmm
brooks launch come to mind
You may find the Nike tempo miler or infinity react to your liking
Specialty running stores don't stock many 15s and they tend to be in the most popular shoes. The Ghost or addiction, the NB 860/880, maybe the Pegasus, usually a beast/addiction or nb940/840 or Asics GT 4000 and maybe the GT 2000 or Cumulus. Maybe a Bondi or stinson.
What you can do is try on 14s. If you like the shoe then order the 15s. You'll pay at the store Brooks and iirc Asics will drop ship to your door. The other brands will ship to the store.
ETA: If you're ever swinging by Tucson LMK prior to. I'll take you into the Running Shop and get you sorted. I've got a few pro & AG runners/triathletes I do this for.
Brian Stover USAT LII
Accelerate3 Coaching Insta