Sentence:  Some day a <WSD>Plutarch</WSD>, without a Plutarch's prejudice will arise, and with malice toward none but charity for all, he will write the life of the statesman, Gladstone. 
Meaning of the word marked with <WSD> tags:  The classical historian and essayist Lucius Mestrius Plutarchus (46-120 (C.E.)). Often used as a byword for a biographer, to suggest that the writer is especially skilled or has other attributes associated with Plutarch.