6. Koro-sensei (Assassination Classroom)
Korosensei can travel up to the speed of Mach 20 with his superhuman speed.
5. Kizaru (One Piece)
Kizaru is capable of moving and attacking at the speed of light, and all of his attacks are based on the element of light. Thus, allowing him to travel at the speed of light.
4. Saitama (One Punch Man)
Saitama was able to complete a 1500 meter dash in an instant during his hero tryouts. He is so fast that he leaves afterimages when moving at high speeds, and it took him just a few seconds to jump from the Moon back to Earth also keeping the safety of both in mind.