If you can talk your DM into letting you hybrid barbarian (which doesn't have to change the backstory of your character one bit beyond "i'm a striker now!"), the Stand and Bang build is fantastic.
If you can't get away with that, but can get away with a Slayer (which is still a fighter), go STR/DEX, take the full charge package (surprising charge, horned helm, vanguard gouge, badge of the berserker), at level 3 retrain into or at level 4 take the Martial Cross-Training feat to trade your second use of Power Strike for Rain of Blows. Take the utilities that let you break free of terrible status effects (which means train endurance). Be a werebear, and after level 10 use claw gloves to add +1d10 damage to all of your attacks. For PPs, Kensei is boring but effective, or feel free to be more creative.
If you are stuck as a weaponmaster, go greatweapon/two-handed weapon mastery, duplicate the above items as closely as possible, with the same charge package, rain of blows, and consider PMCing barbarian.