Obama:The only ones I know of who did it for sure were LBJ and Nixon. If you have accusations against others, make them. I'm unaware of any others. (Bill Clinton, George W Bush, and Barack Obama have all been accused, falsely in each case I believe.)
https://www.washingtonpost.com/politics/the-influence-industry-obama-gives-administration-jobs-to-some-big-fundraisers/2012/03/06/gIQA9y3txR_story.html
W:More than half of Obama’s 47 biggest fundraisers, those who collected at least $500,000 for his campaign, have been given administration jobs. Nine more have been appointed to presidential boards and committees.
http://www.washingtonpost.com/wp-dyn/content/article/2009/02/09/AR2009020902519.html
Bush made more than 100 such end-of-term appointments to a constellation of presidential boards and panels, such as the President's Council on Physical Fitness and Sports and the U.S.-Russia Polar Bear Commission. Like other presidents, he often turned to close aides and top political supporters to fill the last-minute postings, many of which will outlast President Obama's current term.
Nearly half of Bush's appointments after Election Day were filled by donors who gave a total of nearly $1.9 million to Republicans since 2003, according to an analysis of the postings. At least 20 of the positions were filled by former Bush aides, plus others filled by old hands from the administrations of Richard M. Nixon, Ronald Reagan and George H.W. Bush.