As long as you build a combat-oriented rogue, you'll probably achieve what you want regardless of prestige class. Barring the ninja PrCs, I'm not sure WotC has many PrCs that would fit your character.
The Guild Thief (from FRCS) is one way to go. The Nightsong Enforcer, from a past issue of Dragon Magazine, makes for a good cobat rogue. If you have access to them, there are several assassin PrCs in EN Publishing's Crimson Contracts that would be fine for a neutral (or evil) player character, and there are several "avenger" rogue PrCs in FFG's Path of the Shadow.
Edit - Oh, you should also consider the Ninja core class from Rokugan Campaign Setting, if your DM allows it. Fighter's BAB plus full sneak attack progression. You still lack the armor and hit points to be a tank, and you're not going to find any good PrCs that maintain the BAB and sneak attack, but it still makes for a great combat rogue.