Have you checked the lower mount on the passenger side? I had a rough idle issue for over a year and it drove me to insanity. What fixed the problem for me was running fuel injector cleaner additive (not a fan of additives but its all i had access to) and I took the Throttle Body out and cleaned it up real well with Carb cleaner. Even into the intake manifold without taking it off. The amount of gunk that game out was insane (I did it when i had 184k miles on it). Pay extra attention to where the "valve" that connects to the throttle cable inside the body, it can get stuck when trying to idle which causes a rough idle. Once I did those two things the car idles like a kitten now. Took maybe 30 minutes to pull out the air cleaner, unbolt the body and clean it up.