I can't reply because of my browser or even put up images but this is directed at mypasswordis1234. I think it is because Thanos and Galactus, particularly Galactus, have a plethora of feats and are so popular it is fairly common knowledge. But for instance, some of Galactus's many feats include destroying 3 solar systems in one blasts just because he was angry, fighting and defeating Tyrant (a weaker version soloed Silver Surfer, Morg, Terrax, Gladiator, Beta Ray Bill, Jack of Hearts and Ganeymede with minor effort) and their battle destroyed surrounding galaxies as side effects, possessing the ultimate nullifier which can erase the universe, cometely restoring the island of Manhattan after it was uprooted and erasing all the memories of those who witnessed it minus the heroes who tried to help, turning Terrax a confirmed anet buster into a worm (and back again? I forgot that part) in a severely weakened state and so on. Thanos himself has feats of annihilating planets, defeating whole civilizations without destroying the planet, nearly overpowering the mind of Galactus, being unharmed by the likes of the Silver Surfer, soloing the Avengers, and even sending the Sorcerer Supreme back in time. And at many stages, Thanos has been absolutely immortal and even reality warpers could not kill him and barely harm him. I wish I had links to all these but I don't.
I swear I felt that somebody will write "everybody knows it" or "common knowledge" in this thread. :D I see that it is. I didn't even found the 3 solar system blasts scan, but doesn't matter, because the statement is, he is a galaxy buster, without any device. The nullifier is a device.
The other feats you mentioned are OK. The cosmic power is a versatile power. But I would like to see as he destroying galaxy in a nice scan(I mean, not a 60yo painted scan).
About thanos. Defeating whole civilizations? That's why I said he is not more impressive than dbz characters. The saiyans do the exact same thing, except they really destroyed planets too with their own power. Being unharmed by SS is not so convincing. He has durability against energy beam, OK. I could use the screwed logic that silvergardford "how did't destroyed the planet when he got planet destroying beam". But he still didn't show any great speed(fighting) feat. Was he speedblitzzing anyone? And I don't think he immune to reality warping. That would mean he stand next to TOAA and such beings because he would completely invulnerable to everybody's attacks, including Galactus too...
Edit, I forgot:
@SpeedForceSpider: Excellent counter-argument again.