Front Rubbing - Tires, Suspension or Wheels?

Thanks for setting me straight (I think). I had to make a couple drawings and sketch everything out so it would make sense to me.

The TTII in an 18x9.5 isn't offered in a 4.75 backspace. There is a 5.00, but the only thing that would help me on the tub side would be the slightly narrower tire, though my clearance with the fender lip would be OK.

There is also a 4.5" backspace, but that would reverse the situation; I would gain a 1/2" clearance on the tub side (plus the difference in the tire, but I would be sitting exactly where I'm at on the fender side (minus the narrower tire). So is 0.4" enough on either the fender side or the tub side? I'm not so sure. Unfortunately, the wheel is not offered in a 9" width. Then next step down is 18x8.