Bent axles can have similar effect.

Also another big part for freewheel wobble is the threaded part. Sometimes the threads are done in a separate process with a die and this will likely create a new axis for the thread and in angle and/or offcenter from the hub shell. This will throw the freewheel bouncing while the hub is spinning true.
Also threads are not a great way to center parts, so even if the threads on the hub are nice and true, and the freewheel is nice and true as well, when they are threaded each part may have a different axis since the threads have some play and depending where the thread is binding will create wobble.
A finicky thing to do is to get a dial indicator and re-seat the freewheel several times, add some teflon tape on the threads to limit play in the threads, touchup with a file the very end of the last thread on the freewheel hoping to get a better fit (when it's torqued, the last thread is stopping further tightening, so a light touchup will make the freewheel thread more and maybe will counter with other defects and appear much more true in a different final angle position of the threaded parts)

For the cassette hub, type this wobble is greatly diminished since the centering is not relying on threads... so an offcenter axle or a bent axle is likely the culprit.
Check that the balls are all there.. a missing ball in the bearing may force the cones to one side a bit.