seeing as how Chidori was passed down through Sharingan Users, I believe everyone capable of having a Sharingan, whether Uchiha, or implanted Sharingan, be capable of learning Chidori, Also since Mangekyou Sharingan is available to Uchihas, Tsukiyomi, and Amaterasu would be a nice addition, since they're 2 jutsus that come along with Mangekyou.