Soul Caliber... Mitsurugi owns all. In every game, he's ridiculously overpowered for his speed. One combo (-> -> A A, <- A A) performed twice will axe 90% of your foes health, and travel far enough to put your opponent out of the ring on smaller stages. In SC4, someone fell asleep at the game balance station, as he's received range, speed, and strength boosts.
DOA... Ein. For the same 'Overpowered/Overspeed' reasons. He got slightly worse in 4, but fortunately, they introduced the Spartan of Much Lance-punching in that game. Screw what everyone says about her being low-tier, I'm unstoppable in that armor. Also, major bonus points for giving her a bad american accent when speaking japanese.