Fist Fighter       CR 12
Male or Female Human Fighter12
Any Medium Humanoid (Human)
Init +2; Senses Listen +4, Spot +4
Languages Common

AC 19, touch 17, flat-footed 12 (+2Bracers, +2 Dex, +4 Wisdom, +1 Other)
hp 101 (12D10+24+12);
Fort +10, Ref +6, Will +8

Spd 30 ft. (6 squares)
Melee Unarmed Strike +18,+13,+8 (1D8+8/19-20x2)
Base Atk +12; Grp +16
Space 5 ft.; Reach 5 ft.
Atk Options Stunning Fist 5/day, Fiery Fist, Fiery Ki Defence
Combat Gear Potions: Greater Magic Fang+5, Barkskin+5, Shield of Faith+5, Cat's Grace, Owl's Wisdom, Protection from Arrows10/Magic
Special Actions Spring Attack

Abilities Str 18, Dex 14, Con 14, Int 8, Wis 18, Cha 10
SQ Human Traits
Feats I.Unarmed strike, W.F.:Unarmed strike, Sk.F.: Tumble, Dodge, Mobility, W.S.:Unarmed Strike, Spring Attack, Improved Toughness, G.W.F.:Unarmed Strike, Stunning Fist, Fiery Fist, Fiery Ki Defence, G.W.S.:Unarmed Strike
Skills Jump+19, Tumble+12
Possessions Bracers of Armor+2, Monk's Belt, Gauntlets:Power+2, Combat Gear

The "Fist Fighter" is an interesting alternative to the Monk while still being basically a "Martial Artist" Style of Foe/Ally.