Can the pronoun I be used as an object at the end of a sentence?

No, the pronoun "I" is never an object in a sentence.

The pronoun "I" is a subject pronoun, a Word that takes the place of a noun (name) for the person speaking as the subject of a sentence or a clause. Examples:

• I like this movie. (subject of the sentence)
• This is the movie that I like. (subject of the relative clause)

The pronoun "I" can end a sentence if it's a predicate nominative (a subject complement).

A predicate nominative is a noun or a pronoun that follows a linking verb to restate the subject of the sentence.

A linking verb acts as an equal sign, the subject of the sentence is or becomes the object. Examples:

• The one who cleaned out the shed was I. (one = I)
• The best runner on the team is I. (runner = I)

The pronoun that takes the place of the noun (name) for the person speaking as the object of a verb or a preposition is "me". Examples:

• Sandra invited me to her party. (direct object)
• Grandma made me some cookies. (indirect object)
• Jim is going to the mall with me. (object of the preposition)