Mike Monaco, over at Swords & Dorkery, sent along a link to his post where he examines a set of Grenadier AD&D miniatures whose contents were designed by Gary Gygax "to be the ideal small party to explore any Dungeon." Oddly enough, I owned this set and didn't remember until Mike's posted that Gary had had a hand in selecting the minis included in it. While it's probably a mistake to read too much into his selections, I don't think his selections were arbitrary. They certainly do shed some light on his conception of D&D, particularly with regard to its humanocentric focus.
Thanks for bringing this to light, Mike.