One rotor much hotter than other 3 - cause of vibrations?

[speedyspaghetti]

Hey guys,

As many of you know, I have been trying to track down this annoying vibration / wobble that I've been experiencing through my steering wheel for past year or so. Today, another forum member was generous enough to let me swap wheels with him to see if that was the case, but the problem persists. However, when I was replacing the wheels after the test drive, I noticed that my driver side front rotor was a good bit hotter than the other three. When I got home, I used my IR thermometer and confirmed - all 3 were between 85 and 95 degrees F and the driver left was at 115-120 F depending on the part of the rotor I pointing the thermometer at. Could this be responsible for the vibration and wobble? Would it be a warped rotor issue? Unbalanced rotor? Sticking caliper? What's the best way to check for these?

In case anyone asks, the following have been done already in hope of figuring this out and have not solved the issue:

Tie Rods Inner (L+R)
Tie Rods Outer (L+R)
Drop Links (Front)
Struts (All 4) + Mounts/Bearings
Lower Control Arms (All 4)
Front Track Arms (L+R)
Rear Trailing Arms (L+R)
Wheel Bearings
Tires (All 4)
Sway Bar Bushings (All 4)
Alignment (Thrice)
Wheel Balancing (5 times and counting...)