Quarterstaff Two-Handed Weapon Fighter Monk (hope nobody else posted something like it yet)

Race: Human
Allignment: Any Lawful
Stats: Str:20 Dex:14 Con:14 Int:7 Wis:14 Cha:7
All acquired statpoints go into Strength.

There are a bunch of ways to do this, keep going till level 11 monk for another flurry-attack,
or what I did:
Just 1 level of Monk and pump 2 Handed-Weapon Fighter for crazy AB and Damage increase (you get Greater Power Attack taking this route, which is a 2 Handed-Weapon Fighter exclusive feat at lvl 16 if I recall correctly)

A Quarterstaff is a monk flurry weapon, so right off the bat you get 2 attacks with it it if you have a single monk level.

I chose traditional monk to have +2 will and another +2 from the 14 wisdom. Will is important on melee attackers, but mostly on tanks. Still you don't want this badboy becoming confused and wailing on your tanks. I play on higher difficulty, so I prefer the Will and Fortitude saves.

You can go 1 level of Scaled Fist, 1 level of Thug and build a Dazzling Display, Cornugon Smash, Shatter Defenses, Skill focus Persuasion and Intimidating Prowess type of build. Switch the Wisdom stat for Charisma, you'll have really low willsaves though. However, you're a fighter and can opt for less points in Constitution due to your above averag health increase per level, you're not meant to be attacked anyway and there are some good Constitution increasing items, including a Quarterstaff which gives a morale bonus to constitution, so it stacks with other sources. One of your artisans will make this for you, just be sure to select the type of item you want them to make in the dialogue options when they bring you a gift once a month.

Use Enlarge spell, you don't want to be engaged, so attack from behind your tank(s). Later Octavia has Legendary Proportions. That's why you'll also might want to take Cleave, Cleaving Finish, Greater Cleave and Improved Cleaving Finish.

Pump skillpoints into Persuasion and Perception if you go traditional monk route
Otherwise Persuasion and Use Magic Device (for the Lead Blades wand mostly) if you want a Scaled Fist.

Build him up as you want, with typical fighter feats, so weapon focus and weapon specialization quarterstaff. I'm not sure if Power Attack is mandatory to get Greater Power Attack, but it's a good feat nonetheless, due to your crazy high AB, you can afford to use Power Attack... and you can wear Gloves of Dueling to further increase your damage and AB.

Dex is at 14, intended for Combat Reflexes. When you are enlarged it'll be 12, giving you 1 standard and 1 extra Attack of Opportunity, with the belts you'll have even more. Good for a Thug/Scaled Fist 2H-Weapon Fighter, or if you have someone else which can do it for you. I take 1 thug on Tristian, since he sucks with ranged anyway. and have Demoralize on Autocast, give him Dazzling Display by taking Weapon Focus Light Crossbow and add Skill focus Persuasion.

As a high level fighter you can get critical mastery, allowing for two critical feats to activate when you crit. You're doing more attacks than other two-handed fighters, so you'll definitely be critting regularly. Take improved critical quarterstaff (since I havent encountered a keen Quarterstaff yet) and Critical focus to open up the path to the Critical feats. Don't be too hasty and take the sickening critical and any of the other early critical feats, there are better ones if you wait, like exhausting and blinding critical.

That's it, this guy dishes out damage at an alarming speed, especially when hasted. You'll only have -2 on persuasion attempts, which is doable, don't forget you have linzy and you get so many feats that you can easily slide in Skill Focus: Persuasion.

Enjoy!