Was Mufaddal b. ‘Umar al-Ju’fi an al-Khattabi a ghali?

There are various opinions on this personality.
Unfortunately they are very contradicting to the point that some suggest that he is unreliable and others on the other end of the spectrum suggest that he was a very special companion of the sixth Imam.
Some of our greatest contemporary scholars conclude that he is reliable including Ayatollah Khoei