Kanye West just added another big name to the list of people willing to help his social initiatives in Chicago ... ex-NBA star Quentin Richardson, who says he totally down to work with Mr. West. Richardson is a Chi-Town native ... and lost his brother to gun violence there back in 2005. So, when…

Former NBA player Quentin Richardson was just booted off his flight after a dispute with a flight attendant ... TMZ Sports has learned. Q was in the 1st class section of a flight out of Orlando, FL headed for LAX ... but he never got off the ground. We spoke with Quentin who confirms he was…