Lieutenant-Colonel Sir Alexander Gordon KCB
ADC to Lord Wellington who was very fond of him.
A monument was erected in his honor at the spot where he got hit, just behind La Haye Sainte.
In the Waterloo movie he is depicted by Rupert Davies. The movie Gordon however is more of a combination of several members of the Gordon family including the founder and Colonel of 92nd Regiment of Foot, The Gordon Highlanders (or as Napoleon called them, those Amazons).
In my opinion this site is the best source of uniform reference for the 100 days (Waterloo) campaign: