I bought a used Aventon Sinch ST. It's not particularly powerful, with a 500W motor. I don't use the throttle, but it's fine in hilly Worcester, MA with pedal assist. I pedaled it up Dead Horse Hill without trouble and had plenty of battery left to ride around for an hour. I'm not saying this particular bike is right for you, but you may be over-estimating your need for torque.

https://www.strava.com/activities/14316326414

https://www.hannibal.net/archive/art...f395df64e.html