Here's a list of 2008-2015 first rounders that have been traded, by team:
Philadelphia 4 (Chris Pronger, Chris Pronger, Steve Eminger, Kris Versteeg)
Boston 3 (Jaromir Jagr, Tomas Kaberle, Nathan Horton)
Ottawa 3 (Bobby Ryan, David Rundblad, Chris Campoli)
San Jose 3 (Brent Burns, Dan Boyle, Brian Campbell)
St. Louis 3 (Ryan Miller, Jay Bouwmeester, Kevin Shattenkirk)
Columbus 2 (Jeff Carter, R.J. Umberger)
Calgary 2 (Olli Jokinen, Mike Cammalleri)
Colorado 2 (Semyon Varlamov, Adam Foote)
Los Angeles 2 (Jeff Carter, Dustin Penner)
New Jersey 2 (Ilya Kovalchuk, Cory Schneider)
Nashville 2 (Paul Gaustad, Mike Fisher)
N.Y. Rangers 2 (Rick Nash, Martin St. Louis)
Pittsburgh 2 (Jarome Iginla, Marian Hossa)
Toronto 2 (Phil Kessel)
Atlanta 1 (Dustin Byfuglien)
Carolina 1 (Jordan Staal)
Dallas 1 (Mattias Norstrom)
Detroit 1 (Kyle Quincey)
Florida 1 (Tomas Vokoun)
Minnesota 1 (Jason Pominville)
Montreal 1 (Alex Tanguay)
N.Y. Islanders 1 (Thomas Vanek)
Tampa Bay 1 (Andrej Mezsaros)
Vancouver 1 (Keith Ballard)
Washington 1 (Troy Brouwer)
Isn't Philadelphia currently fighting with the Rangers for 2nd in the division? Years after trading their 2008, 2009, 2010, and 2011 first rounders? They also traded the 31st overall pick in 2007 for Martin Biron. Pretty good results years later from San Jose and Boston, too.
Also, Nash and St. Louis compare favorably to most of that list, especially considering they have term where most of them are rental.