I voted yes but Crowder would never start in that line-up. They would find an actual PF to play there and Crowder would be awesome off the bench playing multiple positions.
You could plug in Jordan Mickey and that team would still be great (albeit not very realistic). I understand in theory it is possible we trade for Butler and also sign probably the best two FAs but you could add Butler, Durant, and Howard to any team, even the Sixers, and make the same case.