Michael Oher

Michael Oher repeatedly demanded $15 million from the Tuohy family over "The Blind Side" royalties, and if they didn't ante up he would "defame them on social media and/or TMZ as 'fakes' and 'thieves,' according to new legal docs obtained by TMZ.

Quinton Aaron -- the man who played Michael Oher in "The Blind Side" -- is furious with those clamoring for Sandra Bullock to lose her Oscar over the new Oher drama ... telling TMZ Sports the actress has absolutely nothing to do with any of it.