https://www.amazon.com/Hurricane-Wall-Mount-Fan-Residential/dp/B01FFT0BDG/

This is what is hanging on my walls. And I use them for the exact same purpose. 18" fans just dont push enough air. And you also want air to move around and circulate so the oscillating action is good too. If you use fog machines you are going to want to upgrade to a haze machine to get more even coverage that doesnt fall out of suspension in the air quickly. Also find some way to exhaust some of the warmest air up near the roofline.