Publius Valerius Poplicola, depicted in the early books of Livy (and the subject of an extant biography by Plutarch: see web address 1), was reputedly Roman consul four times in the last decade of the C6 BCE. See generally Andrew Drummond in OCD4 p.1535, on both him and his later namesake Lucius Valerius Poplicola Potitus.