Had this idea pop into my head the other day...a sort of 'adviser' type warrior, he'd be a vet/older so would have poor stats in terms of physical combat, his utility would be in being able to (after set up but before moves) be bale to re-position a random amount of miniatures, say between 1 and 6?
Their would be limits though, wizards being haughty, captains often resenting being given orders and constructs/creatures being either non-sentient, uncaring or unable to comprehend orders would all be unable to benefit from re-positioning other troops and apprentices(easily bullied) would be able to benefit.
I would make him semi-customisable being able to buy equipment at the start but unlke captains these fellows are too old to learn new tricks and do not gain advances,