If you need a score for the win, then you should probably go by PFR's list of
the greatest TD scoring returners. On punt returns, the top three of all time were Jack Christiansen (8 TDs on 85 returns), Eric Metcalf (10 TDs on 351 punt returns), and Rick Upchurch (8 TDs on 248 punt returns). If you're just looking for the best possible field position for your offense to start at, then go with their
all-around returners list, which would suggest either Billy Johnson (2 of the top 4 punt return single-seasons of all time) or Rick Upchurch (the best cumulative punt returner of all time).
If you'd rather go by awards, I believe that Rick Upchurch and Mel Gray are the only two players to earn 3 first team AP All Pro awards as a returner, although Upchurch made his for his punt returns while Gray made his for his kickoff returns.
If you just want to talk about recent guys at their peak, I'd pick Hall. If you just want to pick a player based on their performance today (i.e. a past-his-prime Hall), then Football Outsiders says that Philly has the best punt return unit in the NFL by a massive margin, so the pick would be Desean Jackson.
So there you go, clearly the answer is Jack Christianson, Eric Metcalf, Rick Upchurch, Billy Johnson, Dante Hall, or Desean Jackson.