Usually most wheels will 'pop off' with the precise blow from a 'soft' rawhide or lead hammer.
Loosen the nut so that it totally covers the thread end of the spindle and so that the threads of the nut and spindle are 'protected'. Put a 'plate' of either metal or dense wood to the end of the nut / spindle, begin to 'pry' the wheel hub towards you, and give the 'plate' a sharp blow from the hammer into the nose of the spindle/plate. Sometimes takes three hands (two hands and a 'knee') to do this.
Especially if the spindle and hub bore were put together with a 'grease', the process is usually more successful.
Mechanics rarely use 'pullers' just a BIG 'soft' lead or 'rawhide' hammer and 'levers' with precise aim so not to damage 'threads', etc. However, its a developed 'art' to remove a shaft connection with a hammer; .... if your aim is 'real good' then a steel hammer.