Orc Chieftain

The Orc Chieftain was a chieftain in league with the fiery demon that lurked in the Dwarven city of Moria, the Balrog.

The Ambush
While the majority of the Orcs were slain, their chieftain managed to get past Boromir and Aragorn, armed with a shield and a spear. He wounded Frodo Baggins before being slain by Aragorn after a short fight.

Trivia

 * In Ralph Bakshi's The Lord of the The Rings, the orc chieftain is not almost man-high but rather a corpolent orc of the average size.