Raimi only seemed like an odd choice at first if you knew nothing about his body of work. Man couldn't get people to give him the rights to established superheroes, so he made his own. And the Evil Dead effect was tailor-made for Spider-Man.
Seriously though, Darkman, Hercules, Xena, the MANTIS pilot, to a lesser extent Army of Darkness... which one of these films/TV shows say "outside the box" when it comes to superhero stuff? If anything, Raimi was almost too "on-the-nose."