Commander of the Army of the Potomac, Ulysses S. Grant
On his way to a reception in his honor, Ulysses S Grant was caught in a rain shower. He offered the protection of an umbrella to a stranger walking in the same direction. The stranger confided that “Between us, I have always found General Grant to be very much an overrated man.” Grant said, “That is my opinion as well.”
Source: The little Brown Book of Anecdotes. Clifton Fadiman. Little BRown Books. 1985.