I and my Father are one is an excellent proof text to show the Jesus is God. Read the entire chapter of John 10 and you can easily see the context.
Ellicott- (30) I and my Father are one.—The last clause of John 10:29 is identical with the last clause of John 10:28 if we identify “Father’s” with “My.” This our Lord now formally does. The last verses have told of power greater than all, and these words are an assertion that in the infinity of All-mighty Power the Son is one with the Father. They are more than this, for the Greek word for “one” is neuter, and the thought is not, therefore, of unity of person, but is of unity of essence. “The Son is of one substance with the Father.” In the plural “are” there is the assertion of distinctness as against Sabellianism, and in the “one” there is the assertion of co-ordination as against Arianism...... We have seen above that they assert both oneness of power and oneness of nature.