Movies about non-romantic obsession?

When you look at obsession movies the vast majority mainly covers romantic obsession (chasing stalking etc..) and I'm not looking for something like that.

What I'm looking for is someone that will go above and beyond to achieve his goal and they don't care about the cost or the consequences.

I tried looking for those kind of movies and the only one that came in mind was The Prestige, which is extremely good and perfectly fits the criteria.