If you want shield bashing pole-arm user, phalanx fighter is your best mundane option.
A quick read of the boards will put you on the path of the 'vestigial arm' benefit for the alchemist, which is one way to get around the 'not enough arms' problem. I personally soured on the Trip builds, and was glad to see the clarification that nullified 'trip locking' a character that stands up from prone, but if this is the style of beatdown you are looking forward to putting on someone, more power to you.
Be prepared to swap out short jokes for overcompensation jokes when you make enlarge person your thematic power
(once daily power for natural dwarven enhancement, if your enlarge mutagen lasts for more than four hours, please consult your alchemist immediately)
In fairness to the DM "the DM has a rep of being brutal to half orks" 'could' just mean he enforces roleplaying penalties on the race that is a half-breed with what most people would consider a 'monster' race.
If 'brutal' means the half-orc characters are met less favorably in towns and less welcomed by NPCs I would consider that fair.
If 'brutal' means all the enemies arbitrarily target any half-orc at the outset of any combat, just because the GM inherently dislikes them, I'd agree with you that he is being too harsh
"can be" isn't backed up by the fluff in the Race description. I'd say that a GM is more than a little bit within his right to make a half-orc character feel unwelcome in rural areas. That is part of the theme of playing a mixed monstrous race is living down the reputation of your people...
From Races in PRD
Half-orcs
Half-orcs are monstrosities, their tragic births the result of perversion and violence—or at least, that's how other races see them. It's true that half-orcs are rarely the result of loving unions, and as such are usually forced to grow up hard and fast, constantly fighting for protection or to make names for themselves. Feared, distrusted, and spat upon, half-orcs still consistently manage to surprise their detractors with great deeds and unexpected wisdom—though sometimes it's easier just to crack a few skulls.
Physical Description: Both genders of half-orc stand between 6 and 7 feet tall, with powerful builds and greenish or grayish skin. Their canines often grow long enough to protrude from their mouths, and these “tusks,” combined with heavy brows and slightly pointed ears, give them their notoriously bestial appearance. While half-orcs may be impressive, few ever describe them as beautiful.
Society: Unlike half-elves, where at least part of society's discrimination is born out of jealousy or attraction, half-orcs get the worst of both worlds: physically weaker than their orc kin, they also tend to be feared or attacked outright by the legions of humans who don't bother making the distinction between full orcs and halfbloods. Still, while not exactly accepted, half-orcs in civilized societies tend to be valued for their martial prowess, a....
on a side note... sorry for derailing the thread
It's not about how a character looks... and I wouldn't disagree that your dwarf is taller than most or your half-orc is downright sexy.
The player character can be as exceptional as you want, but this isn't about the player character, this is about how unexceptionally racist the average yokel is, and I think the book support commoners giving the half-monster races some grief.
any setting in which the basic book applies
I'm not trying to insert my opinions on your setting, or the way you run golarion, I was simply refuting your "..just because the DM feels like being a jerk" comment with the RAW citation that in core rulebook backs up a negative reaction to half-orcs. It isn't a GM being "racist" or "intentionally harsh on character concepts" it is a core concept to the half-orc race that a half-orc PC is heroically overcoming the negative prejudice he faces everyday. (or not so heroically if you prefer)