Here is a list of position player teammates who were both in the top 15 in Fangraphs WAR in a given season since 2008. It does not really mean anything. It's also not a list of the two best position player teammates, because that would basically be Mike Trout or Andrew McCutchen and their best teammate.
What this does show is that it is quite rare to have two really good position teammates on the same team at the same time. And the Brewers show up on it a couple of times. Cool!
2014 Brewers || Carlos Gomez and Jonathan Lucroy, 12.2
2013 Red Sox || Jacoby Ellsbury and Shane Victorino, 11.4
2013 Orioles || Chris Davis and Manny Machado, 13.1
2013 Cardinals || Matt Carpenter and Yadier Molina, 13.4
2012 Braves || Jason Heyward and Michael Bourn, 12.7
2012 Brewers || Ryan Braun and Aramis Ramirez, 13.0
2011 Red Sox || Jacoby Ellsbury and Dustin Pedroia, 16.8
2011 Rays || Ben Zobrist and Evan Longoria, 12.5
2010 Rays || Evan Longoria and Carl Crawford, 15.0
2010 Cardinals || Albert Pujols and Matt Carpenter, 13.2
2010 Giants || Andres Torres and Aubrey Huff, 12.4
2009 Rays || Ben Zobrist and Evan Longoria, 16.0
2008 Mets || Carlos Beltran and David Wright, 14.0
2008 Red Sox || Kevin Youkilis and Dustin Pedroia, 12.5