Haha yup. But force-sensitivity isn't the only requisite for being the Apprentice (Ring-bearer). Each character must also have been in a position of destined training (Anakin being found on Tatooine, Luke being mentored by Obi-Wan and Yoda, and a few more listed below). Using this system, characters like Aayla Secura and Qui-Gon Jinn cannot be Apprentices, just supporting companions.
Here's the current list I've got for Apprentices: Luke, Leia, Anakin, Obi-Wan, Bastila Shan, and Jacen, Jaina, and Anakin Solo. There's pretty much no limit to who can become an Apprentice, but it should be focused towards the main characters of large story arcs.