Greetings!
Well, Black Dirge, I would submit the following:
Roman Centurion
Level 4 Expert/Level 6 Fighter: (Focus skills on Craft-Carpentry/Craft-Stonemasonry; Profession-Carpenter; Profession-Stonemason; Knowledge-Siege Engineering; Knowledge-War; Knowledge-Streetwise; Knowledge-History; Diplomacy; Gather Information; Intimidate; Knowledge-Nobility; as well as Spot, Listen, Sense Motive, and Wilderness Lore.
Such skills are essential for providing the needed skill ranks to reflect a Centurion's long experience, as well as diverse skills as an engineer, combat soldier, and officer. Centurions not only work daily with the legionnaires of their unit, but they also interact on a daily basis with the aristocratic Tribunes as well as the Legate (or commanding General)of the legion. The Centurion is often responsible for teaching younger legionnaires the skills that the Roman Legionnaires are famous for.
Equipment: Banded Mail seems to be the best D&D equivalent of the Lorica Segmenta, and provide him with a large Steel Shield, a Masterwork Shortsword, Masterwork Dagger, Helmet, cloak, and a wooden rod, which is a symbol of his authority. Hobnail sandals, harness, belt, small pouch, waterskin, and you're good to go!
Feats: Hmmm...Power Attack, Cleave, Great Cleave, Leadership; Dodge, Mobility, Spring Attack; Expert Tactician; Iron Will.
These feats seem to me to accurately reflect the Centurion's ferocious fighting capability, as well as skill with tactics, leadership, and universal Iron Will. To become a Centurion, a person had to be incredible tough, driven, disciplined, and ruthless, as well as skilled beyond all other lesser legionnaires. Centurions, were, after all, the best men of the entire Legion. They were selcted from men who were the top ten percent!
Hope this helps!
Semper Fidelis,
SHARK