Hey guys - those documents say Wheeler is the Solder of the Year for Army Missile Command. Not for the whole Army. So was there a top award for the overall Army? Or maybe different branches of the Army each had their own Soldier of the Year? Those are details a journalist could easily get screwed up. So don't stop digging.
Looks like there is one in each command and one overall winner.
https://www.army.mil/article/156980/Yes, it seems like there are multiple recipients of the award specific to each command. Prior to 2002 the Best Warrior competition didn't exist, so it isn't clear if there was an overall Soldier of the Year. I certainly haven't found any reference to one.