Samuel. See reference below.
1And the child Samuel ministered unto the LORD before Eli. And the word of the LORD was precious in those days; there was no open vision. 2And it came to pass at that time, when Eli was laid down in his place, and his eyes began to wax dim, that he could not see; 3And ere the lamp of God went out in the temple of the LORD, where the ark of God was, and Samuel was laid down to sleep; 4That the LORD called Samuel: and he answered, Here am I. 5And he ran unto Eli, and said, Here am I; for thou calledst me. And he said, I called not; lie down again. And he went and lay down. 6And the LORD called yet again, Samuel. And Samuel arose and went to Eli, and said, Here am I; for thou didst call me. And he answered, I called not, my son; lie down again. 7Now Samuel did not yet know the LORD, neither was the word of the LORD yet revealed unto him. 8And the LORD called Samuel again the third time. And he arose and went to Eli, and said, Here am I; for thou didst call me. And Eli perceived that the LORD had called the child. 9Therefore Eli said unto Samuel, Go, lie down: and it shall be, if he call thee, that thou shalt say, Speak, LORD; for thy servant heareth. So Samuel went and lay down in his place. 10And the LORD came, and stood, and called as at other times, Samuel, Samuel. Then Samuel answered, Speak; for thy servant heareth. 11And the LORD said to Samuel, Behold, I will do a thing in Israel, at which both the ears of every one that heareth it shall tingle. 12In that day I will perform against Eli all things which I have spoken concerning his house: when I begin, I will also make an end. 13For I have told him that I will judge his house for ever for the iniquity which he knoweth; because his sons made themselves vile, and he restrained them not. 14And therefore I have sworn unto the house of Eli, that the iniquity of Eli's house shall not be purged with sacrifice nor offering for ever. Exodus 33:11 And the LORD spake unto Moses face to face, as a man speaketh unto his friend....... Paul on the Damascus road.
4And he fell to the earth, and heard a voice saying unto him, Saul, Saul, why persecutest thou me? 5And he said, Who art thou, Lord? And the Lord said, I am Jesus whom thou persecutest: it is hard for thee to kick against the pricks. 6And he trembling and astonished said, Lord, what wilt thou have me to do? And the Lord said unto him, Arise, and go into the city, and it shall be told thee what thou must do. 7And the men which journeyed with him stood speechless, hearing a voice, but seeing no man.
Also everyone to whom Jesus spoke while on earth.