Okay these are anime from the 90's, they are probably pretty well known but they are a lot different to the same suggestions they seem to pop up over and over in each thread.
Arc the Lad, this one isn't great but it is a very good fantasy/elemental anime.
Gasaraki, one of my favourite mecha anime, extremely under rated, although the first couple of episodes are very poor.
Ninja Scroll, this is definatey a great anime, badass ninja action with enough gore, the tv series was solid as well.