Joe Biden comes across as down to earth and as a representative of the common man/woman. He has certainly served President Obama well. Whether or not he is the 'best' vice president is subjective. However history remembers Joe Biden, there can be no doubt that Mr. Biden has devoted his life to public service.
I don't know a huge amount about all the vice presidents of the past so it is difficult to truly say whether he is definitely the best. But his recognition and widespread respect and love from most people tells you everything about his achievements working alongside Obama and how successful he is. Therefore there is a very good chance he is the best vice president ever.
Yes, Joe Biden was one of the best vice presidents in history. He played an active role as the vice president, filling in for the president when needed and working on projects himself. At the same time, he never overshadowed the president or let himself get in the way. The Medal was really an award for Biden's total body of work, including his years of service in the Senate and his important acts such as the passage of the Violence Against Women Act.
CNN did an article on this issue in 2012, and Joe Biden didn't make the cut. In fact, as far as ranking goes, they came up with the following best Vice Presidents, and some of them went on to become President, either by default or in their own right: 1) Lyndon B Johnson, 2) George H.W. Bush, 3) Al Gore, 4) Richard Nixon, and 5) Dick Cheney (who was called the most powerful and influential Vice President in U.S. History).
In my opinion Joe Biden was not the best vice president in U.S. history. He did a lot for the American people but I believe Harry S. Truman to be the best if not one of the best vice presidents of the U.S. as he assumed the role of president after Roosevelt's death during the dawn of the nuclear era.