I have always thought Nerlen's game and body type resembled Marcus Camby more than anyone else
That is a good comparison. Lanky, good quickness, but not a super athlete (though athletic enough).
You compared him to Jordan in an earlier post though?
Camby and Jordan have very similar physical measurements. Jordan is more athletic than Camby was, but physically they were pretty similar. Noel is physically similar to each of them and athletically is probably somewhere between them. Chandler is less physically similar. A tall thin guy, but the other measurements aren't quite there.
here is part of a draftexpress overview for one of the four centers being discussed.
Overview: A long, athletic center who is a productive defender, an outstanding rebounder and a just-decent offensive player. Has a huge wingspan and good height for a center, but is extremely lanky. Very fluid for a five, but not super quick or explosive. Relies more on his incredible length and timing more so than freakish athleticism. Shows very good lateral quickness, but doesn’t have the bulk to dominate the block. Has some decent offensive tools. Uses his athleticism to find some easy opportunities. Not a horrible outside shooter, especially for a center. Can finish at the rim, but not efficiently. One of the best shot blockers in the game. Rebounds at an extremely high rate.