I've been working on a build that might interest the OP. Although I am taking 4 levels of fighter, I'm opting not to take Dungeon Crasher because the feat seems worth more.
I will have Pounce + Knockback + Shock Trooper + Improved Trip, so I will get to attempt a Bull Rush against everyone I hit, knock them into their allies and then try to trip both, and get a free attack on any successful trips. I'll use a reach weapon + armor spikes and be large, so I'll threaten a huge area, making it likely I'll be able to reach them for those free attacks.
I'll also have Steadfast Determination and a massive Con score, so Fort and Will saves should be fairly easy. I'm starting at 6th level, so that's as far as I've outlined it at this point and one of the House Rules I'm playing under with this build is that Power Attack is a combat option for everyone, not a feat. So it's not listed below (Of course, you could just pick this up via a Flaw, etc).
I considered using the Whirling Frenzy rage variant, but I expect I'll be getting a lot of extra attacks, and I'd rather not have the -2 penalty to them. The extra Con is probably worth more than the AC boost, also.
Goliath Barbarian 2 (Wolf and Lion (CChamp) Totem)/Fighter 4Ability Scores (32 pb)Str 18 (16+2race) (10)
Dex 14 (15-2race+1lvl) (8)
Con 18 (16+2race) (10)
Int 10
Wis 8
Cha 10
Feats: Endurance (1), Improved Trip (Bar2 bonus), Improved Bull Rush (Ftr1),
Knockback (Ftr2),
Extra Rage (3),
Shock Trooper (Ftr4)
Steadfast Determination (6)
Tactics: Heedless Charge pounce with a 2-handed reach weapon
Free Bull Rush against anyone hit, using Directed Bull Rush + Domino Rush to knock them into each other, tripping them. Improved Trip gives me free attacks against anyone tripped as well.
Later: Combat Reflexes,
Leap Attack, Reckless Rage, ?