Last year Mike Ingham sent me a number of shots of Napoleonic units from the WHC collection, of which the above Doug Mason painted Elite Miniatures Saxon Guard unit is one of the most striking. Mason is of course capable of very intricate and detailed work, but he's also capable of producing figures that look superb in units. My units tend to look like groups of individuals so it's an ability that i'm certainly envious of. I suspect it comes down to having a clear vision of the end result before you begin - planning where each figure will be placed within the unit, knowing which details to paint and which to leave out, etc.
At it's peak the WHC collection boasted literally thousands of Mason painted (and sculpted - of which more anon) figures - most of which were commissioned in the post-Gilder by Gerry Elliott. The numbers will be reduced now as Mike Ingham sold a fair number last year (some of which will feature here soon...ish), indeed as Mike was willing to part with the Saxons i don't know whether you'll find the above unit at the new WHC.