Quan Chi
When youre playing Quan Chi, youre thinking with portals. His whole fighting style is based on messing with the other players head, making him one of the most enjoyable combatants to take into the ring. One minute youre hypnotizing the other player and making them act like a zombie, the next youre summoning a hellbat to rain death from above. And the portals! Quan Chi is constantly sticking his hands, swords, and other players into portals and tossing them all over the screen. He may be evil, but you cant go wrong with this tricksy necromancer.
Goro
'Press X to Goro' has become something of a minor meme among MKX players, since this hulking, four-armed Shokan warrior constantly stares at you from the character select screen, as if insisting that you buy him as DLC if you don't already have him as a pre-order reward. But for those who prefer the 'brute force' approach, Goro can really bring the pain with his flurry of punches and screen-crossing leap attack. And that Fatality where he tears off all your limbs at once is just brutal.