Half-elf Rogue with a racial substitution from APG can have proficiency with any one weapon, martial or exotic, instead of Skill Focus. Take an Elven Curve Blade for a finessable 1d10 with an 18-20 and a bonus vs. sunder. That makes a pretty nasty Rogue right there, and it still benefits from the -1/+3 bit of Power Attack. Or just take the greatsword and make a Strength-based Rogue. With Pathfinder's less-sucky version of Sneak Attack, you can make a pretty deadly thug-style Rogue, if you're willing to drop some of your sneaky stuff.