Here is my favorite powergamer build:
Paragon orc cleric:
Martial weapons, all armors, Rage, smite abilities, strong spellcasting
Very high Strength
Race !/2 orc
1 Cleric -practiced Spellcaster
(destruction, Str domains)
2 1/2 orc Paragon -Extra Rage (rage 3 times a day)
1 1/3 orc paragon - +2 str
3 Human Paragon - +2 str 2 cleric lvls,
bonus feat power attack,
6th lvl feat Extra Smiting
5 lvls Cleric lvl 9 and 12 optional choices
Starting Stats: 32 point buy
Str: 18 Con 14, Dex 10, int 10, Wis 15, Cha 8
End stats:
Str:26 Con 14, Dex 10, Int 10, Wis 16, Cha 8
Optional
Str 24 and use the human stat bonus on Con.
Weapon of choice: 2 handed great sword.
BAB : 9 / 4
Melee : 17 / 11 2d6 + 11
With Divine Power and Rage
Melee: 25 / 15 2d6 + 19 (str 36)
With Smite and ( 9 point power attack)
Melee: 20 / 14 2d6 + 34
This is with no magic items in the equation and a single buff spell.
On top of dishing dmg:
Caster Level: 12
Spell slot level: 8 (4th lvl spells)