The person we voted "most likely to succeed" is Samantha. Who else should it be, but the smartest person in our class? is this right?

The statement "The person we voted "most likely to succeed" is Samantha. Who else should it be, but the smartest person in our class?" contains a wrong choice of word and makes it grammatically error. "Who else should it be, but the smartest person in our class?" must be replaced by " Who else should it be other than the smartest person in our class?". It sounds so good and is correct.