Which producer co-created 'The Big Bang Theory' and 'Two and a Half Men'?

Which series follows the Pearson family across multiple timelines? Which series follows Olivia Pope, a Washington, D.C. crisis manager? Which producer created 'Grey's Anatomy' and 'Scandal'? Which producer created the 'Law & Order' franchise? Which producer created 'All in the Family' and 'The Jeffersons'? Which producer created 'Happy Days' and 'Laverne & Shirley'? Which writer created 'The West Wing'? In 'The West Wing', which actor played President Josiah Bartlet?