top 3 dragon ball gt villain

3.baby vegeta

initially, Baby is single-minded in reviving the Tuffle race and exterminating the Saiyans. Over time, it is shown that he is cunning enough to dominate the Z Fighters, possessing Vegeta and successfully restoring the Tuffles' home planet. However, Baby is also incredibly childish and immature; he is very prone to taunting, and flies into a rage if he is teased enough. Ironically, despite seeing the Saiyans as a barbaric race, he displays enjoyment in battle as well; upon becoming a Golden Great Ape, Baby pretends that he is on a mindless rampage (which is a common occurrence among Great Apes and Golden Great Apes), and massacres countless followers as a means of testing out his abilities. He is very intelligent, and has an extremely egotistical and selfish personality.
baby power level
1,300,000,000
2 super 17.

After the evil Baby is killed by Goku, peace is thought to have been finally restored. However, in the depths of Hell, two masterminds work on a horrific plot: Dr. Gero (the evil, but brilliant, scientist responsible for all of the Red Ribbon Androids) and Dr. Myuu (who is responsible for the completion of Baby) team up to create the ultimate being. They decide that by merging the normal Android 17 on Earth, with a Machine Mutant that they create in Hell, they can create the ultimate android killing machine.

Super 17 punches Vegeta in the stomach

Myuu and Gero then use the Machine Mutant clone to brainwash the android 17 on Earth into joining them, first using both 17s to synchronize their energies together to open the gates of Hell, allowing themselves and other previously destroyed villains to escape. The real Android 17 then asks his twin sister Android 18 to join, but ends up killing Krillin when the latter tries to contradict Hell Fighter 17's voice in Android 17's head. He then fends off Android 18's attack with relative ease. A short time later, 17 reaches his Hell Fighter counterpart, interrupting the latter's fight with Vegeta, at the same time as the Z Fighters.

Super 17 beating Trunks

At this point, the two 17s finally fuse together, and transform into the ultimate killing machine, "Super Android 17". The super android then battles Vegeta, Gohan, Goten, Trunks, and Majuub (while Goku is trapped in Hell) and defeats all of them with barely any problems, shrugging off their strongest attacks, including Vegeta's Final Shine Attack. He also once again kills Dr. Gero after Myuu reveals that he programmed Super 17 so that he would have full control over him, leaving none for Gero.

Super 17 challenges Super Saiyan Goku

After Super 17 defeats all of the Z Fighters except the struggling Vegeta, Goku returns to Earth with some help from Piccolo and Dende. He saves Vegeta from one of Super 17's energy beams and immediately engages Super 17. He starts his fight against Super 17 as a Super Saiyan, but as this proves ineffective, he transforms into a Super Saiyan 4. Once transformed into a Super Saiyan 4, Goku is able to fight competently against the android. However, Super 17 absorbs all of the energy attacks that Goku unleashes on him, and by the time Goku realizes this, Super 17 has absorbed enough energy to grow stronger and overwhelm the Saiyan. Goku attempts to sacrifice himself to destroy Super 17, but is unsuccessful, due to Super 17 putting up an energy barrier that protects them both from the explosion. Before Super 17 can obliterate Goku, Android 18 comes to Goku's aid and berates 17 for losing his independent will and murdering her husband. This faciliates a falling out which sees Super 17 turn the attack on Dr. Myuu, killing his second creator as well.

Super Saiyan 4 Goku grabs Super 17 from behind

As they resume the fight and Android 18 continues to distract 17 by shooting energy blasts, Goku notices that while Super 17 is in his absorption pose, he creates a shield around him to prevent Android 18's energy blasts from reaching him, and laughing hysterically all the while. It is at that point that Goku realizes Super 17's sole weakness: when Super 17 absorbs energy, he is actually vulnerable to attack. Goku charges Super 17 with a Dragon Fist, blowing a hole straight through him. He then shoots a powerful Kamehameha that finally kills the android once and for all. It is later explained that Android 17 had been influencing Super 17 to reveal this weakness and leave himself vulnerable to attack.
power level :
 1,500,000,000

omega shenron

After Syn Shenron absorbs the other six Dragon Balls and corrupts them with his negative energy, he assumes his empowered form of Omega Shenron, also called Super Yi Xing Long (超一星龍, Sūpā Yī Xīng Lóng (Īshinron), lit. "Super One-Star Dragon"). In this state, the One-Star Dragon Ball moves from his forehead to his chest, surrounded by the other six Dragon Balls. The ten spikes on his body (two on his elbows, two on his shoulders, and six on his back) become even longer than before, most noticeably the two on his elbows, and he develops even more on different parts of his body, including his knuckles and shoulders. He loses the fleshy spikes on his chest, and his horns move closer together, with a narrower angle between them.
Omega Shenron gains the abilities of all the other Shadow Dragons, as well as a massive general power increase. Omega Shenron can also take this form with less than seven Dragon Balls-such as when Goku eats the Four-Star Dragon Ball, but he is somewhat weaker and only possesses the powers of the Shadow Dragons whose Dragon Balls he did manage to absorb.
As Omega Shenron, being the dragon of absolute destruction, his brutal personality becomes more pronounced and he becomes intent on destroying everything and everybody that stands in his way. He is nearly invincible in this form and is only outclassed by the fusion of Super Saiyan 4 Goku and Super Saiyan 4 Vegeta, Super Saiyan 4 Gogeta. He easily beats up Goku, Vegeta, Majuub, Gohan, Trunks, and Goten, and nearly managed to destroy the Earth through the mere release of his negative energies. In the end, it took a Spirit Bomb
from the whole universe to defeat him.
power level :
 1,900,000,000