Akavia ben Mahalalel
From Zissil
Akavia ben Mahalalel was a leading sage during the final era of Zugot in the same generation as Hillel and Shammai. Once he degraded Shmaya and Avtalyon and he was placed in excommunication. Akavia ben Mahalalel argued with the Sages on four different Halachas. They enticed him retract his opinion and they would apoint him as Av Beis Din, to which he replied that he would rather be called a fool his entire life then be wicked infront of Hashem even for a moment. At his deathbed he requested from his son that he side with the rest of the sages.