Edited with the current build I got
CAPTAIN GREENBELT CR 6
Male Human (Ulfen) Barbarian (Hurler, Invulnerable Rager) 7
CG Medium Humanoid (Human)
Init +4; Senses Perception +10
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DEFENSE
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AC 20, touch 12, flat-footed 18 (+4 armor, +4 shield, +2 Dex)
hp 49 (7d12+7)
Fort +6, Ref +4, Will +2
DR 3/—, 6/lethal; Resist cold 1, Extreme Endurance (Cold)
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OFFENSE
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Spd 30 ft.
Melee +1 shield bash +12/+7 (1d4+6/20/x2)
Ranged touch attack +10 Returning Shield (1d6+6/20/x2)thrown with 2 hands, ranged touch, target ahs reflex save dc 10+1/2 barb level+ barb str mod (2D6+6 with vital strike)
Special Attacks Hurling Charge, Hurling, Lesser
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STATISTICS
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Str 18, Dex 14, Con 13, Int 8, Wis 10, Cha 12
Base Atk +7; CMB +11; CMD 23
Feats Equipment Trick (shield), Improved Shield Bash, Saving Shield, Shield Focus, Vital Strike
Traits Reactionary, Shield Bearer (Ulfen) (1/day)
Skills Acrobatics +4, Climb +8, Escape Artist -1, Fly -1, Intimidate +11, Perception +10, Ride -1, Stealth -1, Survival +7, Swim +1
Languages Common, Skald
SQ Heart of the Wilderness +3, Rage (17 rounds/day) (Ex), Skilled Thrower (Ex), Surprise Accuracy +2 (1/rage) (Ex)
Combat Gear +1 Throwing Shield, Heavy Steel, Chain Shirt;
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SPECIAL ABILITIES
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Damage Reduction (3/-) You have Damage Reduction against all attacks.
Damage Reduction (6/lethal) You have Damage Reduction against non-lethal damage
Damage Resistance, Cold (1) You have the specified Damage Resistance against Cold attacks.
Extreme Endurance: Cold (Ex) At 3rd level, the invulnerable rager is inured to either hot or cold climate effects (choose one) as if using endure elements. In addition, the barbarian gains 1 point of fire or cold resistance for every three levels beyond 3rd. This ability replace
Heart of the Wilderness +3 +5 on CON checks to stabilize, +1/2 level to negative HP level for death, +1/2 level Survival.
Hurling Charge (Ex) You may add a thrown attack at +2 to hit to a charge attack.
Hurling, Lesser (Ex) Throw large objects while raging.
Improved Shield Bash You still get your shield bonus while using Shield Bash.
Rage (17 rounds/day) (Ex) +4 Str, +4 Con, +2 to Will saves, -2 to AC when enraged.
Saving Shield As an immediate action, add a +2 shield bonus to an adjacent ally's AC.
Shield Focus +1 Shield AC
Skilled Thrower (Ex) +10' thrown range increments
Surprise Accuracy +2 (1/rage) (Ex) One attack per rage gains +2 to hit.
Vital Strike Standard action: x2 weapon damage dice.
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Couple of thoughts:
how would a fighter compare to that?
I'd probably look at a melee version of this for a more "in your face" attitude .