Doug Pederson accomplished what no other Eagles coach before him could - bring a Lombardi Trophy to Philadelphia. For what he did Pederson will always remain a legend in the City of Brotherly Love (he already has a statue inside Lincoln Financial Field).
Eagles fans see him as a great coach, and so does ESPN analyst Louis Riddick. Yesterday Riddick put together a list of the top-10 coaches in the league, and Pederson landed at #3, behind only Andy Reid and Bill Belichick.
Eagles fans will argue that Pederson is better than Reid, simply for the fact that Reid was in Philadelphia for over a decade and couldn't get over the Super Bowl hump (and he still hasn't). However, Saints fans will probably argue that Sean Payton's team defeated the Eagles twice last season, so he has the upper hand over Pederson. Rams fans might want to argue that Sean McVay is better than Pederson, but that will never be a legitimate argument because McVay has yet to beat Pederson.
If the Eagles get to the playoffs like they are expected to, they will likely have to face one/both of the Saints and Rams to reach the Super Bowl. We will see by then which of these coach is truly the best of this bunch.