You can't be impervious to the force. Sure the Jedi mind trick won't work, but you can't just be impervious to cosmic energy living and moving through and around everything in the universe. And Jedi can't die either, they just come back as force spirits.

Yuuzhan Vong are impervious to it.

that's because they live disconnected from the force. all living beings are connected to the force, but when the yuuzhan vong were separated from the sentient planet Yuuzhan'tar they were stripped of the force. other than that the only other way to protect yourself from the force is to shield yourself with the. . . the force.