Scorpion, no other Ninja has a bloody spear, or has a fatality where he sends his opener through hell and the body comes back with no flesh or muscle left. I've Beaten all my opponents using escorpião while playing.
I am going to have to pick one of the newer playable characters being skarlet she is just awesome although i also like Jade, Sub-Zero,Sonya Blade and Noob Saibot.
In general... KUNG LAO or SUB-ZERO, in mortal kombat 4 (for nintendo 64) Quan Chi... Kung Lao cause he is a badass and if you have ever played Shaolin Monks then you know just how kick bunda he is... Sub-Zero because, Pfft do i even need a reason?~