Reverse Flash Granted with powers and abilities similar to that of the Flash, the Reverse-Flash is unwavering in his determination to oppose and destroy all that’s important to the Flash. His ability to travel through time allows him to attack the Flash at almost any point throughout history. However, he is unable to ever kill the Flash—for the Reverse-Flash would not exist if he killed his own inspiration. Instead, he does everything in his power to torment and torture the hero, an ominous visitor from a future the Flash never could’ve envisioned.
Perfect Cell is an evil artificial life form, created using cells from several of the main characters in the series, that travels back in time so he can become the perfect being.
Juggernaut He originally possessed untold mystical power which enhanced his strength to an unknown degree and made him a seemingly irresistible, unstoppable being. Once he began to walk in a given direction, no obstacle or force on Earth was able to stop him. Some obstacles, for example many tons of rock, or forces such as plasma-discharge cannons slowed his pace considerably, but nothing stopped him permanently from advancing.
M. Bison A would-be world dictator and megalomaniac, M. Bison rules the fictional Far East country of Mriganka with an iron fist. His ultimate ambition is to control the world's governments through his covert crime syndicate, Shadaloo
Now here's a fight to be seen these four are some of the worse if not the worse bad guy's in there area's. Myself ive got my money on Juggernaut or Bison but not up to me.