I had a similar issue. My alignment specs were great but it always pulled right, even after alignments each year. Tire wear was not abnormal, but I always had to keep the steering wheel at 11:30 on the highway. Mine had been annoying over a few years but got worse - to the point of letting go of the wheel would put me in the right lane in about 3 seconds. In my case it was a bad lower shock bushing I think… or at least I got new shocks because the bushing was “blooming” and the shock was sitting low in the LCA and that plus an alignment (to the same settings) finally fixed it. Depending on mileage I’d look closely at control arm and shock bushings and at ball joints.