For sunni's the reign of 'Umar ibn 'Abdal'aziz is considered as a time of Justice. And he is wdely considerd as the fifth of the rashidi caliphs. I've heard that he made a statement (the verification of which might make a good question here) saying:
If poverty was an (human) enemy I would fight it.
He made many reforms especially fighting former inequity in the taxation system of the Omayyad. For example it is said that the berbers suffered a lot from taxation and other rulings the Omayyads enforced on them (which partly where unislamic) until he came and lifted them from them.
For the above and many other reasons he is considered as the -agreed upon- mujadid (at the end) of the first century.
My question is what do shi'a sources tell about this man? I've lately heard somebody saying that this is a man on which there's consensus among Muslims and I wanted to clarify whether this statement is correct. So please add relevant sources and evidences for your claims.