Streetfighting - Although not a style per se, one could argue that it's the most widespread style of combat. It has no basics or essentials, instead being comprised of the fighter's instincts and experience. Thus, it is a highly personalized style and different for each fighter.
Pro-Wrestling - Highly stylized and flashy, there's controversy, not only as to whether any of it is actually effective in fighting but whether it's even real. Still, many pro-wrestlers have superb conditioning and are skilled martial arts, able to control their techniques so they don't break any necks.