1. Bill Clinton - (I'll just leave this here.)
https://clintonwhitehouse5.archives.gov/WH/Accomplishments/eightyears-01.html
2. Barack Obama
3. George H.W. Bush
4. Ronald Reagan
5. George W. Bush
6. Donald Trump
Biden is only 10 months into his term so it's pointless to place him anywhere.
Clinton's 8 years were an exceptional period in American history, powered partially by the burgeoning technological age as well as the dissolution of the USSR. His impeachment was an embarrassment, but is far overshadowed by his accomplishments.
Even though Reagan had Iran-Contra, a disgusting handling of the HIV epidemic, and awful economic policies, the fight for the bottom is between GWB and Trump. GWB inherited the best economy in US history and governed over the worst recession in 80 years, as well as the disastrous wars in Iraq and Afghanistan. Trump was an embarrassing idiot with horrible, anti-science policies, a revolving door cabinet, two impeachments, completely non-existent leadership during the BLM protests, and a truly horrendous handling of one of the worst pandemics in the nation's history. But that's not what wins him the bottom spot. The bottom spot belongs to Trump for attempting to destroy our Democracy to assuage his pathetic ego; a black mark in our nation's history, and a wound which continues to fester and spread amongst the populace. Nobody else on the list can touch the vileness Trump brought to Washington.