Frieza

Frieza, in Funimation's English anime dub, is a fictional character in the Dragon Ball manga series created by Akira Toriyama.

Frieza makes his debut in Chapter #247: Dark Clouds Swirl Over Planet Namek, first published in Weekly Shōnen Jump magazine on November 6, 1989, as a galactic tyrant feared as the most powerful being in the universe.

Overview
Despite not appearing until the manga's second half, Frieza is widely considered to be the most iconic antagonist from the series due to effectively serving as the catalyst of many of the events depicted in the story, such as Goku's arrival on Earth, the Saiyans landing on Earth, and subsequently the main characters going to planet Namek.

He is also directly responsible for the murder of Burdock, the genocide of the Saiyan race, and the second death of Kuririn, arguably making him Goku's most personal and significant enemy.