I bought this attic fan back in July 2022 for the exact same purpose, but it's still in it's box.
Cool Attic CX1500 Gable Mount Power Attic Ventilator with 2.6-Amp 60-Hz Motor and 14-Inch Blade
Most in the ratings seem to be mounting the fan up against their vents. I wasn't sure this was the way to go so just held off until I could get a better handle on things.