[cerrian]

For a tsundere + hero pairing, there's Full Metal Panic, Eureka 7 (Talho+Holland & another couple w/o spoiling it), Black Lagoon, and Rental Magic. Some might argue that Rock (Black Lagoon) is a wimp, but it is clear that he has the balls to stand toe-to-toe with the roughest of them even though he can't wield a weapon to save his life.

I was going to add Irresponsible Captain Tylor, but Tylor is a mixed bag. He can be wimpish one moment and then be completely something else the next. He has got to be one of the hardest characters to define.