While I can cite things the Fed did to spur the economy, I run in to difficulty citing things Obama did. He did leave the Trump tax cuts in place, until 2013 when the top rate was slightly moved up. He did push the Stimulus Bill, which I guess is a something, and there were bailouts, mostly started by Bush. There was a cash for clunkers for a while.
In my view, the impact of the Fed moves was larger than any of those.