>Orochimaru constantly getting punched by Tsunade in part 1
>Taking blows from the third
>Taking major blows from 3TK and 4 tail Naruto
Not to mention he has snake substitution, Rashomon, White Snake transformation, and snake summons
Minato? lol, why is he even an answer choice?

Orochimaru was resting when that happened. He was off guard/not at his 100%. Sasuke just gets easy power ups his skills are hard working but he just lucky l0lObito survived alot and he's still alive. Minato died when he was sealing the kyuubi. Orichimaru was killed by a HUMAN called SASUKE in other words sasukekilled orichimaru and sasuke is not a bijuu like how minato died or by a death reaper that he was sealing the bijuu with.