My bible reads "He chose us in Him before the foundation of the world.
Us is a group. Paul is telling individuals existing who are "in Christ" that one of the spiritual blessings we have is that He chose us in Him before the foundation of the world.
Us is a group, but it's individuals that get saved. Yes, only those in Christ can praise the Father for choosing them before the foundation of the world. If groups are the object, then we have a major problem because groups are not saved.