I did try the road force balancing, which did not help... but I am not ruling out tires yet.
In my case the vibration gets less noticeable after a 30 min highway ride, which means either tires get warmed up and become softer (the sidewall which is very short and stiff) or something like engine mounts get softer from hot air under the hood (I don`t thick that is the case since vibration is not RPM dependent and is still there if I shift to neutral).
I have gone over front / rear suspension and steering earlier this year - no complaints there, and double checked everything recently again.
I have not replaced the rear tires yet (not in the budget right now). I also have not checked the rear differential fluid/operation. But the vibration is on steering wheel mostly, none on the e-brake handle and maybe barely any in the seat back...
I would also try the finish balancing (on-car balancing) but there are no shops around that do that. So I am thinking maybe I should try balancing beads or Ride-on of some sort?