what motors and motor drivers should i use for a rover made using a flight controller omnibus f4 pro which has 4 pwm outputs?
PWM outputs on your flight controller mean any motor driver should work fine, keep in mind they are usually set up with a direction pin and duty cycle pin, what are the outputs of your flight controller? Are they arranged in this way?
With the above in mind you can just choose the motor based on how much torque and speed you need. This will dictate the operating voltage and current, and that lets you pick a driver.
Could you share some info on what you need these motors to do? Have you done any calculations to determine the torque required?