In the Uplifted series, the historical figure of Mad Jack Churchill is one, such as when he ties a Gestapo officer to a truck and uses it as a battering ram. Justified, since he really was like that in Real Life, since he captured 42 Germans with a broadsword and went into battle with a longbow across his back.
The Tamers Forever Series has several examples but Chaos, Rika, Takato, Takeru, Tatsu and (as it is later revealed) Terriermon are by far the most noticeable examples.
In The Tainted Grimoire, characters are this, be they good or evil, for example Judgemaster Cid Randell, aka the strongest man in Jylland, Illua who showed some of her power in the first chapter and Ensei Rou, who defeated 120 mages, without taking any damage.
Minato from Fairly English Story After being framed for terrorism and escaping the city, when he comes back at 150 Mph in his motorcycle he jump, desmaterialize the motorcycle, run at the police and send 10 police pratrols meters in the air AT THE SAME TIME.
Konoha, one of Sylvia's brothers, from Sylvia The Sylveon. He defies his sadistic trainer, first by running off and evolving into the Pokémon he wants when his trainer had another evolution in mind, then, after a beating-up, destroying his Poké Ball, therefore freeing himself.