Muse are the ones that came to mind as they do like to experiment a lot. Not a big fan of there last album (still had some fantastic songs though) and I'm undecided on this new one, but I never get bored of listening to Origin of Symmetry. They really do try to mix a range of styles in their music though.
Otherwise, maybe Enter Shikari? They also mix multiple styles to come up with their own sound.