patrice motsepe

The third richest man in South Africa.
The second richest black person in the world; ahead of Opera.
Net worth about $3bn.
Founded/built ARM, taking advantage of political connection and BEE laws.
Interesting views on nationalizing mines... see http://www.miningweekly.com/article/shareholders-threaten-to-quit-arm-over-motsepes-nationalisation-prevarication-2010-02-22

As far as influence over DMR relative to Maredi, I would think he wins. Lets hope his ethics steer him towards sharing mineral wealth between more (black) South Africans... as it really should be.