Sway bar

Take a good look at your shocks too. My wagon did the same thing until I replaced the shocks recently. The car passed the "bounce" test, but 3 of the 4 shocks (Gabriel and Monroe cheapies) were obviously junk when I pulled them. Put Sachs shocks all around and man, what a difference!
I replaced the shocks and lower ball joints. The tie rod may be old but aren't worn out. The control arm bushings are good. I haven't checked the upper B joints yet. Of course a sway bar reduces leans a lot in turns but a sway bar will also help stability in the wind.