He needs no introduction... he hates the Saiyan Race, is malicious and mean, and his families' names relate to Cold things :P.
That's right it's Frieza!
If you've watched Dragon Ball Z then you know who this villain is! Originally shown in the series to be in control of the Saiyan Race in which he would have them claim worlds on his behalf. Once he was done with using them, he attempted to eradicate them from existence by destroying their world, however there were still a few younger Saiyans off-planet.
In later years Frieza caught wind of the Namekian Dragon Balls and set about claiming them for himself to wish for immortality. Little did he know that the Z Fighters were also on the same expedition!
Since these early introductions, Frieza has remained in the series both in Dragon Ball Z and Dragon Ball Super as an iconic villainous character, re-testing his strength with Goku due to his early bitter defeat to him.