Grinding noise from brakes

Lancer 2005 es non-abs

I have this problem of brakes grinding from the driver side wheel. All parts are new. Wheel bearing, brake pad clips. Brake pad, rotor, tyres. Still grinding noise. The noise goes away after 1/2 hr driving. Went through a lot of mechanics. Finally find out that there is some play in the rotor, when checked, slight wiggle in the right side of rotor. My question. Do I need a new hub, one mechanic says wheel hub is bent while the dealership says may be the wheel bearing collapsed. No sound of wheel bearing when car is driving or turning. Very quiet on highway. Very bad grinding noise from the wheel when brakes are applied otherwise no sound. Pls help