To my knowledge, other religious leaders did not make claims similar to those of Jesus. These claims are not so outlandish that they would only have been made by a liar, a lunatic, or God in human form as Jesus claimed to be. We have already discussed fulfillment of prophecies and many documented miracles.
1 Eyewitnesses were estimated from the text description of these statements being made to at least his primary disciples (12), a larger group including typically many pharisees and non-disciples (conservatively estimated at 25), and in the area of the Jewish temple upon questioning by pharisees/saduccess (conservatively estimated at 50).
Similar to the previous table, these events were documented during witnesses lifetimes, and these witnesses were willing to be tortured and killed for their testimony without any apparent recanting of that testimony.
New Testament References to Statements by Jesus About Who He is