Orthanc deserted
 

I suppose I will start this thread in the movies because I thought of this during the Siege of Isengard scene.
We all know that Orthanc is gigantic. It holds many secrets, books, and lore. But, is Saruman really the only one who resided there (exclude wormtongue)? Surely, he had loremen, or visitors. But I was just watching the movie when I was just like, "is Saruman really the only one in that huge tower?"

During Frealaf's reign in Rohan Saruman came offering him gifts and buttered him up, and all the Rohirrim seemed to like him. Then Beren the current Steward of Gondor let Saruman reside in Orthanc and gave him the keys to Orthanc (since Orthanc was still claimed under Gondor's rule at the time). Which we are told:
So, that's how Saruman gets control of Orthanc, I don't know if anyone else lived within Orthanc itself, or whether they lived in the Ring of Isengard. Though Saruman did have Men under his command, as Gandalf remarks that the Gate into Isengard was strongly guarded, and by Men who had been awaiting for him to come see Saruman.

Though this doesn't appear in the movies, Saruman did have other servants besides Orcs and Wormtongue, but it always seemed like the Pinnacle itself, Orthanc, was the abodement of only Saruman.

I would also note that in the Council of Elrond Gandalf states that he was taken by "them" to the pinnacle of Orthanc.