Just because we were having fun with basic shield builders, here's a 32 Point Buy (I was told that's standard) shield dwarf character. Level 4 and level 6.
Dwarf Barbarian 2/Crusader 2 (Whirling Frenzy, Lion Totem, and Wolf Totem used)
2 Flaws. Improved Shield Bash, Power Attack, Improved Bull Rush, Improved Trip, Shield Charge
Strength 17, Dex 14, Con 18, Int 8, Wis 14, Cha 6, 45hp, +10 Fort, +2 Ref (or +3 with Fractional Saves, additional +2 when Raging), +2 Will (or +3 with Fractional Saves), 23 AC (25 when Raging)
Gear: Spiked Mechanicus Gear (600gp, Self Crafted), +1 Masterwork Heavy Shield with Masterwork Spikes (1160gp, Self Crafted Mundane Part), Masterwork Smithing Tool (50gp), Sling, 4590gp extra left over (I could afford Mithral Mechanicus Gear, but the overall cost would be more than half total WBL, which I don't think should be allowed).
Skills: Craft Armor smithing 7 (+10 related to metal), Jump 7, Craft Weapon smithing 7 (+10 related to metal)
Maneuvers: Leading the Attack, Vanguard Strike, Crusader's Strike, Stone Bones, Charging Minotaur, with Iron Guard's Glare and Martial Spirit as stances.
Attacks: Shield Bash +8 (1d6+4). When raging, 2 Shield Bash +8 (1d6+7). When Charging and Raging, 2 Shield Bash +10 (1d6+7 plus automatic trip at +7, extra attack if trip succeeds). Or Sling +6 1d3+3.
Dwarf Barbarian 2/Crusader 2/Fighter 2 (Whirling Frenzy, Lion Totem, and Wolf Totem used)
2 Flaws. Improved Shield Bash, Power Attack, Improved Bull Rush, Improved Trip, Shield Charge, Extra Granted Maneuver, Shield Slam, Shock Trooper
Strength 19, Dex 14, Con 18, Int 8, Wis 14, Cha 6, +13 Fort, +2 Ref (or +4 with Fractional Saves, additional +2 When Raging), +2 Will (or +4 with Fractional Saves), 26 AC (28 when Raging)
Gear: +1 Mithral Netcutter Spiked Mechanicus Gear (4750gp, Mundane Part Self Crafted), +1 Masterwork Heavy Shield with +1 Masterwork Spikes (3160gp, Self Crafted Mundane Part), Masterwork Smithing Tool (50gp), Sling, Belt of Strength +2 (4kgp). 1040gp left over
Skills: Craft Armor smithing 9 (+12 related to metal), Jump 7, Craft Weapon smithing 7 (+10 related to metal)
Maneuvers: Leading the Attack, Vanguard Strike, Crusader's Strike, Stone Bones, Charging Minotaur, with Iron Guard's Glare and Martial Spirit as stances.
Attacks: Shield Bash +11/+6 (1d6+7). When raging, Shield Bash +11/+11/+6 (1d6+10). When Charging and Raging, Shield Bash +13/+13/+8 (1d6+22 plus automatic trip at +8 and daze (DC 17), extra attacks if trip succeeds). Or Sling +8 1d3+4.
Needs work, but should be pretty effective. Doesn't seem like anything that's crazy optimized (there's a bunch of Barbarian variants, but that's about it. Mostly it's just a dwarf with a shield and armor). Seems basic and solid, right? I should probably fill in the extra gp costs.
JaronK