Generally, I'd encourage you to check out the Search feature here on Clarity that has a number of featured experts that list where they feel most able to be of help. Check out their reviews and the answers they have submitted to get a good idea of their potential fit with you. Here are a couple of suggestions:

Dan Martell - Founder of Clarity
https://clarity.fm/danmartell

Boris Wertz - Cofounder of AbeBooks which sold to Amazon and an investor in many marketplace companies:
https://clarity.fm/boriswertz

And Elan Mosbacher (I don't know him but his profile looks good) https://clarity.fm/elanmosbacher