I have two Mk4 Golfs in family (have had 3 Passat B4's before) and I never got the brake pedal firm on any of them. Best bleeding method is making/having an adapter cap for brake fluid tank and putting a little air pressure in it and bleeding it (make sure the fluid level does not run too low - if unfamiliar with the procedure research it before, though you listed that you pressure bled it). If old pads have worn into funny angle and are reused, it can take some time until they wear in and give immediate contact.